I need help on homework

uestion 5.

iven:

Mass, m = 25 kg

Tension = 47 N

Let's find the maximum acceleration the truck can have before the crate breaks.

Let the magnitude of the force be expressed as:

= m x a

efore the cord breaks , the maximum tension, T, in the string is:

= ma

Where:

T is the maximum tension

m is the mass

a is the maximum acceleration

ence, to findt he maximmum acceleration, rewrite the equation for a.

We have:

Now, input 47N for T and 25 kg for m to solve for a:

herrefore, the maximum acceleration of the truck before the cord breakes is 1.88 m/s²

Answer:

10 m/2²

Explanation:

v=t/d

blah blah blah

Answer:

10 m/s

Explanation:

Kinetic Energy = 1/2 m v^2

KE / ( 1/2 m) = v^2

then   v =  sqrt ( KE / (1/2  m  )  = 10 m/s

Answer:

The frictional force between the wall and the ball

ANSWER:

Gravity is a theory in that it is a comprehensive explanation of a natural phenomenon that has been tested in a variety of ways.

The time taken for Philippe to go 1000 m is 44.5 s.

The net force on the cart is calculated as follows;

F(net) = F - Ff

where;

F(net) = 745 cos(15)  -  100

F(net) = 619.6 N

The mass of the cart is calculated as follows;

W = mg

m = W/g

m = (6000) / (9.8)

m = 612.24 kg

The acceleration of the cart is calculated as follows;

a = F(net) / m

a = (619.6) / (612.24)

a = 1.01 m/s²

The time taken for Philippe to go 1000 m is calculated as follows;

s = vt + ¹/₂at²

s = 0 + ¹/₂at²

2s = at²

t² = 2s/a

t = √(2s/a)

t = √(2 x 1000 / 1.01)

t = 44.5 seconds

Learn more about net force here: https://brainly.com/question/14361879

#SPJ1

Answer:

F=ma

100=0,5a

a=200m.s^2

The minimum number of ice cubes at 0°C required to cool down the juice is 11 ice cubes (Option C)

We'll begin by obtainig the heat released by the juice. This can be obtained by

Q = MCΔT

Q = 2 × 4700 × -60

Q = -564000 J

Next, we shall determin the mass of the total ice. This can be obtained as follow:

Q = m × ΔHf

564000 = m × 3.34×10⁵

Divide both sides by 3.34×10⁵

m = 564000 / 3.34×10⁵

m = 1.69 Kg

Finally, we shall determine the number of ice cubes. This can be stained as follow:

Number of ice = total mass / mass of one cube

Number of ice = 1.69 / 0.15

Number of ice = 11 ice cubes

Learn more about heat transfer:

https://brainly.com/question/16181212

https://brainly.com/question/10286596

#SPJ1

The average force a 70.0 kg sprinter exerts backward on the track is 84 N.

The law of conservation of energy states that energy can neither be created nor destroyed but can be converted from one form to another.

E = Fd

where;

The average force exerted by the sprinter is calculated as follows;

F = ma

where;

The acceleration of the sprinter is calculated as follows;

v² = u² + 2as

where;

(8)² = (2)² + (2x25)a

64 = 4 + 50a

60 = 50a

a = 60/50

a = 1.2 m/s²

Average force exerted by the sprinter;

F = ma

F = 70 kg x 1.2 m/s²

F = 84 N

Learn more about average force here: https://brainly.com/question/16200276
#SPJ1

a ) The mass of the child and basket = 5.61 kg

b ) The tension T in the cord attaching the child to the scale = 55 N

c ) The tension T' in the cord attaching the scale to the ceiling = 57.94 N

a ) The mass of the child and basket,

[tex]W_{b}[/tex] = 55 N

g = 9.8 m / s²

W = m g

[tex]m_{b}[/tex] = [tex]W_{b}[/tex]  / g

[tex]m_{b}[/tex] = 55 / 9.8

[tex]m_{b}[/tex] = 5.61 kg

b ) In the cord attaching the child to the scale,

∑ [tex]F_{y}[/tex] = 0

T - W = 0

T = W

T = 55 N

c ) In the cord attaching the scale to the ceiling,

[tex]m_{s}[/tex] = 0.3 kg

[tex]W_{s}[/tex] = [tex]m_{s}[/tex] * g

[tex]W_{s}[/tex] = 0.3 * 9.8

[tex]W_{s}[/tex] = 2.94 kg

∑ [tex]F_{y}[/tex] = 0

T - [tex]W_{s}[/tex] - [tex]W_{b}[/tex] = 0

T = 2.94 + 55

T = 57.94 N

Therefore,

a ) The mass of the child and basket = 5.61 kg

b ) The tension T in the cord attaching the child to the scale = 55 N

c ) The tension T' in the cord attaching the scale to the ceiling = 57.94 N

To know more about tension

https://brainly.com/question/28010298

#SPJ1

The potential energy of the microwave antenna with a mass of 78 kg sitting atop a tower that is 45 m tall is 36.69 KJ

U = m g h

U = Potential energy

m = Mass

g = Acceleration due to gravity

h = Height

m = 78 kg

h = 48 m

g = 9.8 m / s²

U = 78 * 9.8 * 48

U = 36691.2 J

U = 36.69 KJ

Potential energy is also called a stored energy. Because an object at rest have high potential energy. Also the higher above the ground the object is placed, higher will be its potential energy.

Therefore, the potential energy of the microwave antenna is 36.69 KJ

To know more about potential energy

https://brainly.com/question/24284560

#SPJ1

Answer:

Gravity pushes the weight down and Alice pushes it up.

Explanation:

In this case, Gravity pushes the weight down and Alice pushes it up. The correct option is D.

Electromotive force is the electrical activity produced by a non-electrical source and is measured in volts.. Electrical transducers, which include batteries and generators, transform other forms of energy into electrical energy to produce an emf.

Due to the high internal resistance of the 8-dry cells compared to the low internal resistance of the accumulators, the current generated by the dry cells is too low compared to the current generated by the accumulators. The accumulators will generate the bigger currents required to start the engine because the dry cells' internal resistance is far higher than that of the accumulators. NB. Generally speaking, accumulators have low internal resistance. mostly because the acid therein is a superb conductor.

The effort done by the battery to transform the chemical energy of the cell into electrical energy is what creates the voltage that the electromotive force (e.m.f.) of a battery correlates to (the current in the circuit).

To know more about electromotive force, click on the link below:

https://brainly.com/question/10497991

#SPJ9

The projectile motion is a 2-D motion. Therefore, if we make the component of the given velocity into x- and y-component, we can solve each component by using all 1-D motion equations. Now it will become very easy to solve projectile motion problems.

Projectile movement is a shape of movement experienced by an object or particle this is projected close to Earth's surface and moves along a curved path under the movement of gravity handiest.

Projectile movement is the movement of an item thrown (projected) into the air. After the preliminary pressure that launches the item, it best reviews the force of gravity. The object is called a projectile, and its direction is known as its trajectory.

A projectile is any object that is cast, fired, flung, heaved, hurled, pitched, tossed, or thrown. you throw the ball directly upward, or you kick a ball and provide it a pace at an attitude to the horizontal otherwise you just drop matters and lead them to lose fall; most of these are examples of projectile movement.

Learn more about projectile motion here:-https://brainly.com/question/24216590

#SPJ1

Centre of mass of the square piece at the middle of the stack is at x = 0 centre of mass of the bottom most square piece in the stack is at{ (l/4)^2 + (l/4)^2}^1/2 .

To know more about centre of mass visit:

https://brainly.com/question/17055505

#SPJ9

Answer:

Newton's 2nd Law

Explanation:

First law concerns balanced forces, which result in either static equilibrium or dynamic equilibrium, where there is no acceleration. Gravity causes the ball to accelerate so it can't be the first law.

Second Law deals with unbalanced forces (F=ma).

Third law relates to "action-reaction" which is unrelated to the scenario.

Answer:

productivity

Explanation:

it's the efficiency of production of goods or services

Answer:

Explanation:

The rate at which goods and services can be produced is called

b) productivity.

Answer:

See below

Explanation:

Find out how long the vertical velocity and accel cause the rock to ground out....then multiply this time by the horizontal speed....then use pythag theorem for the TOTAL distance

df = do + vo t + 1/2 a t^2       df = final height = 0    do = original = 1.6 m

                                              v o = original velocity = 0    accel = - 9.81 m/s^2

0 = 1.6 + 0 + 1/2 ( - 9.8)(t^2)   shows t = .5714 seconds to hit the ground

horizontal distance = .5711 seconds * 41 m/s = 23.43 m

vertical distance = 1.6 m

TOTAL distance = sqrt (( 23.42)^2 + (1.6)^2 )  = 23.48 m  

  If questioner wants horizontal disance <=====use first answer

       if Q   wants TOTAL distance  <====== use second answer

Answer:

771 .4  kg

Explanation:

Remember    F = ma      so     F/a = m    

m = 27000 N / 35 m/s^2 = 771 .4 kg

Answer:

I don't k own what it is dad fjf f fjff

Answer:

Explanation:

Stellar parallax is the apparent shift of position of any nearby star against the background of distant objects

The answers include the following below:

This law states that the force which is needed to extend a spring is directly proportional to the distance in which the spring is extended from its rest or initial position.

The distance gotten is measured with the use of a ruler or a measuring tape so as to obtain an accurate result during the experimental procedures. Hooke'slaw is performed by adding some masses to a spring and taking note of the effect by measuring the length of the spring when the weight of the masses is increased.

Read more about Hooke's law here https://brainly.com/question/2648431

#SPJ1

F = force = 12 N

d = distance = 10 m

W= work

Apply:

W = F x d

Replacing:

W= 12 x 10 = 120 J

A. The velocity of car A with respect to car B is 20 km/h

The velocity of an object A relative to another object B is the velocity that object A would appear to have to an observer moving with B.

The velocity of car A with respect to car B is calculated as follows;

Va/b = Va - Vb

where;

Substitute the given parameters and solve for the  the velocity of car A with respect to car B.

Va/b = 50 km/h - 30 km/h

Va/b = 20 km/h

Thus, we can conclude that the velocity of car A with respect to car B will appear to decrease since they are moving in the same direction.

Learn more about relative velocity here: https://brainly.com/question/17228388

#SPJ1

Given:

he initial velcicty of the runner is

The final velocity of the runner is

The time taken is t = 2.1 s

The initial velocity of the motorcycle is

The final velocity of the motorcycle is

Required:

Acceleration of the motorcycle.

The difference in distance between runner and motorcycle.

Explanation:

cceleration of the runner is

Acceleration of the motorcycle is

The distance travelled by the runner is

The distance travelled by motorcycle is

Thus, the motorcycle travels more distance than the runner.

The

difference between the distance travelled is

Final Answer:

The acceleration of the runner is 1.238 m/s^2

The acceleration of the motorcycle is 3.33 m/s^2

The difference in distance between runner and motorcycle is 82.31 m.

Answer:

Explanation:

The coulombs law is expressed as

F = kq1q2/r^2

where

F is the force

k is the coulomb constant and its value is 9 x 10^9 N/m^2C^2

q1 and q2 are the magnitude of the charges

r is the distance between them

From the information given,

r = 4 cm = 4/100 = 0.04m

For trial 1,

q1 = - 2μC

q2 = 8μC

Recall,

1 μC = 1 x 10^- 9 C

q1 = - 2 x 1 x 10^- 9 C

q2 = 8 x 1 x 10^- 9 C

F = (9 x 10^9 x 2 x 1 x 10^- 9 x 8 x 1 x 10^- 9)/0.04^2

F = 9 x 10^-5 N

There is an attraction

For trial 2,

q1 = - 4μC

q2 = 8μC

q1 = - 4 x 1 x 10^- 9 C

q2 = 8 x 1 x 10^- 9 C

F = (9 x 10^9 x 4 x 1 x 10^- 9 x 8 x 1 x 10^- 9)/0.04^2

F = 1.8 x 10^-4N

There is an attraction

For trial 3,

q1 = - 6μC

q2 = 8μC

q1 = - 6 x 1 x 10^- 9 C

q2 = 8 x 1 x 10^- 9 C

F = (9 x 10^9 x 6 x 1 x 10^- 9 x 8 x 1 x 10^- 9)/0.04^2

F = 2.7 x 10^-4N

There is an attraction

For trial 4,

q1 = - 8μC

q2 = 8μC

q1 = - 8 x 1 x 10^- 9 C

q2 = 8 x 1 x 10^- 9 C

F = (9 x 10^9 x 6 x 1 x 10^- 9 x 8 x 1 x 10^- 9)/0.04^2

F = 3.6 x 10^-4N

There is an attraction

The change in the value of the charge is proportional to the force

A) change in wave speed

Option A is correct

(7) The resultant vector is middle line which is the longest line representing the single effect of the two vectors at both ends.

(8) The resultant vector is any of the lines at the end of the vectors, since any of this line will effectively complete triangle formed by the vectors.

A resultant vector is defined as a single vector that produces the same effect as the two or more vectors combined together.

A resultant vector is usually, drawn to join the head of the first vector to the tail of the second in a triangle method of vector addition.

Also, a resultant vector can be determined by applying parallelogram law of vector addition.

Mathematically, a resultant vector can be determined using this formula,

R² = a² + b² - 2ab cosθ

where;

A resultant vector is always bigger than the two vectors acting together.

Learn more about resultant vector here: https://brainly.com/question/110151

#SPJ1

Answer:

The law of conservation of momentum tells us that momentum is conserved, therefore total initial momentum should be equal to total final momentum. In this case, we can expressed this mathematically as:

mA vA + mB vB = m v

where, m is the mass in kg, v is the velocity in m/s

since m is the total mass, m = mA + mB, we can write the equation as:

mA vA + mB vB = (mA + mB) v

furthermore, car B was at a stop signal therefore vB = 0, hence

mA vA + 0 = (mA + mB) v

1800 (vA) = (1800 + 1500) (7.1 m/s)

vA = 13.02 m/s

Explanation:

Option C) 3. There are about 3 measures until the next part enters in Kookaburra through the expression in Australian countryside.

The expression probably first appeared because of how many bushes and scrub there are in the Australian countryside. Gay — Up until the middle of the 1950s, the word gay denoted happiness and carelessness.

It therefore signified “happy and carefree” during the time this song was penned.

The state has issued them licenses and permits. For authorized and permitted educational initiatives, both kookaburras serve as educational ambassadors. Kookaburras are not recommended as pets by anyone.

They may be very unpredictable, demand a lot of space, must be maintained in a pack, are very loud, and need a special diet.

They consume insects, beetles, worms, frogs, small animals, snakes, lizards, and lizards.

To know more about kookaburra visit:

https://brainly.com/question/28252796

#SPJ13

Answer:

B 2

Explanation:

Angle of reflection is the measure of the angle taken from the normal.