Find the final velocity of the particle if it is initially moving along the x-axis with a velocity of −1.85 m/s

The magnitude of the frictional force on the skier is 20 N.

The magnitude of the vertical force  of skier is 666.14 N.

The value of the frictional force on the skier is determined by applying Newton's second law of motion as follows;

F - Ff = ma

where;

At a constant speed, the acceleration, a = 0

F - Ff = 0

F = Ff

20 N =  Ff

The vertical force due to weight of the skier is calculated as follows;

Fₙ = mg cosθ

where;

Fₙ = (75 x 9.8) cos(25)

Fₙ = 666.14 N

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Answer:

Thomas Young

Explanation:

Hope this helps.

Answer: Final velocity of car is 18.64 m/s

Explanation:

According to equation of motion,

V=U + at

where,

V is final velocity

U is initial velocity

a is acceleration

T is time

in the question,

U=16 m/s

a=0.22 m/s*s

t=12 seconds

on substituting values,

V = 16+(12*(0.22))

V=18.64

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If A force of 67 N is applied on a 10-kg object at an angle of 30 o with respect to the horizontal table and the work done is 257J then the distance it covered is 3.32 m.

A body can change its state of rest or motion through the application of force, which is an external agent. It has both a magnitude and a direction. The application of force is the point at which force is applied, and the direction in which the force is applied is referred to as the direction of the force.

A spring balance can be used to gauge the Force. The SI unit of force is the Newton (N).

The vector product of mass (m) and acceleration (a) is used to express the amount of force (F) . the formula of force can be written like  F = m × a.

The formula for work done is

W = fd cos θ

Here force f = 67 N

Work done W = 257 J

θ = 30°

Substituting the values

d = W/F  cos θ

d = 257 /67 (cos 30°)

d = 3.32 m

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If you don't keep giving a car gas, the car will eventually stop because gas is a fuel that is used by the car as a form of energy.

Our car needs gas that allows the vehicle to operate and move in the forward direction. The fuel system does the process of combustion which moves the pistons of the engine and the car moves in the forward direction. Combustion occurs when the fuel in your engine is sparked by the spark plugs of the engine. When the spark combines with the gas fuel, the gas fuel blasts and moves the pistons which are attached to the tires of a car which leads to the movement of the car in the forward direction.

So we can conclude that the car will stop if the gas is not present in sufficient amounts because gas allows the car to move.

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The balloon will be falling for 0.84 seconds.

The boy is going to drop the balloon when the speed of the cyclist is 30km/hr. i.e. 8.33m/s

Let the distance covered by the cyclist is L. According to question, the distance travelled by the L/2.

Considering that the balloon falls on the head of cyclist.

We can understand, the time period t of the distance travelled by the boy and the balloon will be same.

As the acceleration is constant, we can use equation of motion.

For the balloon,

L/2 = 1/2gt²

Now,

No acceleration for the cyclist, so, for cyclist,

L/t = 8.33m/s

t = L/8.33

Putting the value of t = L/8.33 in L/2 = 1/2gt²,

L/2 = 1/2g(L/8.3)²

L/2 = 1/2gL²/68.89

1 = Lg/68.89

Taking g = 9.8

L = 7.02m

Now we can calculate the time by putting L = 7.02m in

L/t = 8.33m/s

t = 0.84 seconds.

The balloon will take 0.84 seconds to fall down.

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The magnetic fields that are generated naturally by the Earth are what a compass senses and reacts to. Due to gravitational pressure, the iron core of the Earth is partially liquid and partially solid crystal. The Earth's magnetic field is thought to be created by motion in the liquid outer core.

A region where the force is present along hypothetical lines called the magnetic field. This force affects all magnetized objects, including the compass needle, from the south magnetic pole to the north magnetic pole. The needle always faces the north magnetic pole when the Earth's magnetic field is at work.

A magnetic compass can be used to find a magnetic field even though it is undetectable. A tiny bar magnet mounted on a pivot allows a compass to rotate. The magnetic field of a magnet or the Earth's magnetic field is where the compass needle is pointing.

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When the object receives a light push and operates, the oscillation's period is T = 2.084 s.

Calculate time period of the spring with the following formula.

T = 2π√m/k

Where,

m is the mass of the spring

k is the spring constant

As gravitational force is balanced by the spring force.

Now, the above formula can also be written as,

T = 2π√x / g

In this case, x denotes the spring's separation from the equilibrium point.

When a vertical spring has extended by 11 cm (0.11 m),

It is observed that an object with an unknown mass m,

It is suspended from the spring, is at rest

Putting all the values,

T = 2π √ 0.11 m / 9.8

T = 2π √0.011

T = 2.084 s

As a result, when the object receives a light push and operates, the oscillation's period is T = 2.084 s

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The table for the mass of the bicyclist and kinetic energy, and Chloe's speed and kinetic energy, gives the attached graphs of kinetic energy and mass and Chloe's kinetic energy and her speed.

The relationship shown on the graph of the kinetic energy to mass shows that at constant velocity, v, the kinetic energy is directly proportional to the mass.

The relationship shown in the graph of Chloe's kinetic energy to velocity indicates that the kinetic energy varies quadratically with the velocity as the graph is shaped like half of a parabola like the graph of a quadratic equation

Please find attached the graph of the kinetic energy versus mass for the bikers, showing the mass of each biker using a combination graph of a line graph and a column chart.

Please find the graph of Chloe's kinetic energy versus her speed created from the given table using a spreadsheet application

The relationship shown in each graph are as follows;

K.E. = 0.5•m•v²

Therefore, at constant velocity, v, kinetic energy is directly proportional to the mass, and as the mass increases, the kinetic energy increases proportionately

The graph of kinetic energy to mass therefore increases from left to right as mass increases forming the approximately straight red line.

Second graph (kinetic energy to mass)

The relationship between kinetic energy and Chloe's velocity, can be expressed mathematically as follows, given that her mass is constant

K.E. = 0.5•m•v²

K.E. = (0.5•m)•v²

The quantity, (0.5•m), c is a constant, therefore;

K.E. = c•v²

Given that the minimum velocity, v, of Chloe in the given direction can be taken as 0, the graph of kinetic energy to velocity increases quadratically (in the form of half of a parabola) from left to right as the velocity increases.

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a)

  i) the lorry's speed is rising and then stays at a constant speed

 ii) it is accelerating but after 40 seconds, it stays at a constant speed

b)

  speed= 25m/s

  speed=  90km's

Answer:

See below

Explanation:

Lorry starts from rest , then accelerates to reach a constant velocity of 25 m/s

Initial Acceleration =   10 m/s / 20 s =   1/2 m /s^2

Maximum speed is 25 m/s= 25 m/s * 1 km / 1000 m * 3600 s /hr =  90 km/hr

The solenoid is the component that converts electrical energy into magnetic energy. It is created with the aid of a wire coil.

This gadget generates a magnetic field, which is then put to use in a variety of ways. Inside the solenoid, the magnetic field's direction remains constant. The device that transforms electrical energy into magnetic energy is a solenoid. It is made possible by a wire coil. This device creates a magnetic field that is subsequently used in a number of different ways. The magnetic field has a consistent direction inside the solenoid.

To calculate how many turns into gloomy oid there are. The magnetic field equation for the solenoid is the simplest method to remember how to achieve that. Mu not N times I times L, where mu naught is the constant N, gives us B.

I have taken how many turns. is the solenoid's length, and is the current. Our Bs nine Tesla RL is 90.50 m mu not four pi times 10 to the negative seven and I 75 amps, so we may rearrange this so that the end will be equal to B times L divided by mu naught times I.

We'll therefore obtain 4.5 divided by 9.42 multiplied by 10 to the negative 5.

And we will receive several phrases of 47746. hence, um,.4. We will thus have this many turns to bother this cell.

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The electron binding energy for gold essence is. find the longest wavelength( in) of light that could eject electrons from gold in a photoelectric effect trial.

Electron

The electron is a subatomic flyspeck( denoted by the symbol whose electric charge is negative one abecedariancharge.Electrons belong to the first generation of the lepton flyspeck family, and are generally allowed to be abecedarian patches because they've no given factors or substructure. The electron's mass is roughly 1/ 1836th that of the proton. Quantum mechanical parcels of the electron include an natural angular instigation( spin) of a half- integer value, expressed in units of the reduced Planck constant, ħ. Being fermions, no two electrons can enthrall the same amount state, in agreement with the Pauli rejection principle. Like all abecedarian patches, electrons parade parcels of both patches and swells They can collide with other patches and can be diffracted like light. The surge parcels of electrons are easier to observe with trials than those of other patches like neutrons and protons because electrons have a lower mass and hence a longer de Broglie wavelength for a given energy.

Electrons play an essential part in multitudinous physical marvels, similar as electricity, captivation, chemistry and thermal conductivity, and they also share in gravitational, electromagnetic and weak relations. Since an electron has charge, it has a girding electric field, and if that electron is moving relative to an bystander, said bystander will observe it to induce a glamorous field.

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Answer:

X2 -X1/ t2 -t1

Explanation:

To find this speed, you have to use the operation of: X2 -X1/ t2 -t1, we know that x is the distance, we do the operation and that would be our average speed

When 30 passengers, each with average mass of 80 kg, board the car, the car moves down by 0.0001501m.  

Here's the complete question:

A passenger railroad car has a total of 8 wheels. Springs on each wheel compress--slightly--when the car is loaded. Ratings for the car give stiffness per wheel (the spring constant, treating the entire spring assembly as a single spring) as 2.8×10⁷N/m.

When 30 passengers, each with average mass of 80 kg, board the car, how much does the car move down on its spring suspension? Assume that each wheel supports 1/8 the weight of the car.

g = Acceleration due to gravity = 9.81 m/s²

k = Spring constant =  2.8×10⁷n/m

x = Compression of spring

F = Force = Mg

Mass of passengers = 30*6=80 = 2400kg

Each spring supports the following mass

m = 2400/8

m = 300kg

Force of spring (F) = kx

x = F/k

x = mg/k

x = 300*9.81/2.8×10⁷

x = 0.0001501

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The 25w bulb burned out.

Both bulbs (200w and 25w) are connected in series to the 240v line, the same current is expected to flow in them. The  expected resistance of the 200W bulb will be less than 25W. Therefore more potential difference than 120V will be developed in 25W bulb hence it will fuse.

As per the question:

Voltage, V = 120 V

Power of bulb 1, P = 25 W

Power of bulb 2, P' = 200 W

Voltage in series, V' = 240 V

Now,

When the two bulbs are connected in parallel, voltage across them is same and the current in the two branches is different.

Using P= V²/R to calculate the respective resistances of the two bulbs:

25 = 120²/R

R = 120²/25

R = 576Ω

100 = 120²/R

R = 120²/100

R' = 144Ω

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The 25W bulb burned out almost instantaneously when the two light bulbs were connected in series across a 240V line because the voltage across it is much more than its rated voltage.

Two lights bulbs, one 25w and another 200w, to find the bulb that burn out almost instantaneously, we first find the following:

Resistance R=V^2/P

For the bulb of 25W

Resistance=120^2/25

                 =576.0Ω

For the bulb of 200W

Resistance=120^2/200

                  =72.0Ω

Net resistance of the circuit:

R=R25W+R200W

 =576.0+72.0

 =648.0Ω

Current, I

I=E/R

=240/648.0

=0.370A

Voltage across 25W bulb

Voltage=I*R

           =0.370*576.0

           =213.12V

Voltage across 200W bulb

Voltage=I*R

           =0.370*72.0

           =26.64V

Since voltage across 25W bulb is much more than its rated voltage of 120V, 25W bulb will burn out.

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The expressions that will be equal to the voltage of the battery in the circuit, will be:

ΔVA+ΔVB

ΔVA+ΔVC

ΔVD

The difference in electric potential, that is described as the work required per unit of charge to shift a test charge between the two points, is known as voltage, electric, electric pressure, or electric tension.

When charged electrons (current) are forced through a conducting loop by the pressure of an electrical circuit's power source, they can perform tasks like lighting a lamp. In a nutshell, voltage equals pressure and is expressed in volts (V).

Voltage drop is the reduction in electrical potential along an electrical current's passage in a circuit. Because some of the energy supplied is lost, voltage drops in the source's internal resistance, across conductors, and across connectors are undesirable.

It should be noted that because when we take the sum of voltage across these terminal the voltage will be same as that of the battery.

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This concept of resultant is based. on a simple law of vector addition.

So,

R = [tex]\sqrt{F 2 + F₂ 2 + 2 F, Fg cos Ф}[/tex]∅

where ∅ = angle between f1 & f2

R² = √[tex]\sqrt{ 3² + 4 ² + 2(3) (4) cos 90° 2}[/tex]

[tex]\sqrt{9+16}[/tex]

[tex]\sqrt{25}[/tex]

= 5N

Magnitude of resultarst force is 5N.

To find the resultant force subtract the smaller force from the larger force. The direction of the resultant force will be in the same direction as the larger force. Draw axes on the free-body diagram. Decompose the force acting on an object into its x and y components.

Add the x and y components of all forces to calculate the x and y components of the resultant force. Finally, find the magnitude and direction of the resultant force using the x and y components. The resultant force is expressed as the total amount of force acting on an object or body along the direction of the object. If the object is at rest or moving at the same speed as the object, the resultant force is zero.

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the mass on Moon will be 98.1 kg.

Given - Weight on Earth and moon

Find - Mass on Moon

First, determine the mass of the Earth using its gravitational acceleration.

Taking acceleration due to gravity as 10 m/s².

Mass = weight/acceleration due to gravity

Mass = 981/10

Performing division

Mass = 98.1 kg

As is already common knowledge, the mass is independent of the acceleration caused by the planet's gravity. The mass of the moon will therefore be 98.1 kg.

The earth weighs 6. 1024 kilograms, while the moon weighs 7.4 1022 kilograms. Calculate the force that the earth would apply on the moon if their distance were 3.84 x 105 miles.

The Moon's mass is not included in the Earth's mass. The Earth+Moon system has a mass of about 6.04561024 kg since the Moon's mass is roughly 1.2% that of the Earth.

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.

Standard of measure is referred to as the specific measure to which and other measures are compared to ensure uniformity and examples include the standard unit for various parameters.

This is referred to an approved and accepted form of measurement against which others are measured or compared and an example is that of mass in which the standard unit is kilogram.

It is important to have a standard as it helps to ensure that there is uniformity when dealing with different types of bodies and their respective features or properties.

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The man climbs up 19.6 meters into a canon. He gets horizontally fired, so for 2 seconds, the stuntman will be in the air.

The rate at which an object's velocity varies with respect to time is referred to as acceleration in mechanics. accelerations' magnitude as a vector. Depending on which way the net force is pulling on an object, it will accelerate in that direction.

Acceleration has a magnitude and a direction, making it a vector quantity. Vector quantities include velocity as well. The definition of acceleration is the change in the vector of velocity over a time interval divided by the time interval.

According to the question,

s = 1/2 gt²

t = [tex]\sqrt{2s/g}[/tex]

t = [tex]\sqrt{2(19.6)/9.8}[/tex]

t = 2 seconds.

Hence, the stuntman will be in the air for 2 seconds.

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Answer:

Explanation:

It is C

Answer:

Explanation:

Hope this helps :)

The change created by melting is known to be called a physical change.

A physical change happens when a given  substance's physical characteristics alters without undergoing a kind of chemical composition.

Note that Melting, changes in size, as well as in volume, color, also density, and crystal shape are said to be an examples of common physical changes.

Physical changes, like melting or the act of boiling, are usually simple to undo even though the final result might not always look exactly the same as the original. Aside from gaining or losing energy, particles do not change during physical changes and no new materials are created.

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We observe a higher fraction of elliptical galaxies within a cluster because they are dim and consist of older stars. So, such type of galaxies affects the closer galaxies, which makes it to be in clusters making the closer galaxies similar.

Consequently, we also observe a higher fraction of spiral galaxies in the field because spiral galaxies consist of big arms with most of the young stars. These are less in the universe as per our observation. So, such type of galaxies appears in a field because of their high brightness and structure.

According to the observations, elliptical galaxies are more in comparison to the spiral galaxies.

These elliptical galaxies are dim and consist of older stars. So, such type of galaxies affects the closer galaxies, which makes it to be in clusters. It makes the closer galaxies similar.

Spiral galaxies consist of big arms with most of the young stars. These are less in the universe as per our observation. So, such type of galaxies appears in a field because of their high brightness and structure.

If the cluster is crowded, there would be more elliptical galaxies as the collision of spiral galaxies forms elliptical galaxies. The spiral arms of the spiral galaxies are most affected by the collision and the morphology of the galaxy changes. It goes from spiral to elliptical. Probability of such collisions is more in crowded clusters in comparison to alone galaxies.

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Answer: 69

Explanation: 160 divided by 2 is 69

The magnitude of the Resulting force calculated is 1.125 N.

The force of repulsion between two objects is calculated by Coulomb's Law which is a quantitative statement between 2-point charges. The equation of Coulomb's Law is,

F = [tex]\frac{ K q^{2} }{r^{2} }[/tex]

where k = Dielectric constant of the medium also called Relative permittivity of medium and is dimensionless.

In the first case, Force is  F = 0.900 N

In the second case, given, one q is tripled and the other is increased by a factor of 5/3. Distance between is doubled, Let the final force be F'

[tex]F' = \frac{kq^{2} *5}{r^{2} *4}[/tex]

F' = (0.009 × 5)/4

F' = 1.125

Hence, the Final force is 1.125 N

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The magnitude of the charge on each sphere  4.33 × 10^(-6) C.

Magnitude means simply "distance or volume" in the perspective of physics. In terms of motion, it shows the absolute or relative size, direction, or movement of an object. It is used to describe something's size or scope. Magnitude in physics generally refers to a quantity or quantity. The definition of magnitude is "how much of a quantity." In order to compare the speeds of an automobile and a bicycle, for example, the magnitude can be utilized. It can also be used to explain how far an object has traveled or how much an object weighs in terms of its magnitude.

Distance between center's of 2 spheres

r = 75 c

= 0.75 m

Force between the charges

F = 0.3 N

Formula for force between the charges is;

F = (kq1×q2)/r²

Here;

k is a constant = 9 × 10^(9) N.m²/C²

q1 = q2

= q since they are identical charges

Hence ,

F = kq²/r²

q = √(Fr²/k)

q = √(0.3 × 0.75²/(9 × 10^(9))

q = 4.33 × 10^(-6) C

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1: b, conduction

2: a, convection

3: c, radiation

i hope these answers help! if theyre incorrect i apologize

The van was moving at a speed of u is 11.77 m/s when the brakes were first applied.

The following formula can be used to determine the van's starting speed:

v = u + at

Where,

v is final velocity

u is initial velocity

a is acceleration

t is time

Given data :

v = 2.25 m/s

a = ?

u = ?

t = 8.20 s

Now, by solving the formula

a = v - u / t

To find the initial velocity, we must now use another kinematic equation.

u² = v² - 2ad

By putting values of equation (1) into (2) we have:

u² = v² - 2 ( v - u / t)d

u² = (2.25 m/s)² - 2 (2.25 m/s - u / 8.20 s) 40 m

u² = 41.51 - 80 x 2.25

u² = 41.51 - 180

u = 11.77 m/s

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When a ball is rolling down a ramp, it has maximum potential energy when it is at the top, and the kinetic energy is maximum at the bottom of the ramp.

Kinetic energy is the type of energy present in a body due to the property of its motion and potential energy is the kind of energy present in a body due to the property of its state.

Kinetic energy can be easily transferred from one body to another but potential energy is not transferable. Kinetic energy is relative with respect to nature and potential energy is non-relative with respect to nature.

As the ball is rolling down a ramp, its potential energy decreases and kinetic energy increases.  The ball has the maximum potential energy when it is at the top, and this potential energy is transformed into both translational and rotational kinetic energy as it rolls down.

When the ball is at the topmost height, its gravitational potential energy is maximum and zero kinetic energy. When a ball reaches the bottom of the ramp, it will have zero potential energy and maximum kinetic energy.

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