3. The value of frictional force on block in the given
diagram is (Take g = 10 m/s2)
5N
m = 3 kg
8.
u = 0.3
(1) 4N
(2) 5 N
(3) 6 N.
(4) 9 N​

Complete Question

A 95 kg clock initially at rest on a horizontal floor requires a 650 N horizontal force to set it in motion. After the clock is in motion, a horizontal force of 560 N keeps it moving with a constant velocity. Find the coefficient of static friction and the coefficient of kinetic friction.

Answer:

The value for static friction is [tex]\mu_s = 0.60[/tex]

The value for static friction is [tex]\mu_k = 0.70[/tex]

Explanation:

From the question we are told that

The mass of the clock is [tex]m = 95 \ kg[/tex]

The first horizontal force is [tex]F _s = 560 \ N[/tex]

    The second horizontal force is    [tex]F _k  =  650  \  N[/tex]

Generally the static frictional force is equal to the first  horizontal force

So

     [tex]F _s  =  m  *  g  *  \mu_s[/tex]

=>   [tex]560  =  95  *  9.8  *  \mu_s[/tex]

=>    [tex]\mu_s =  0.60[/tex]

Generally the kinetic frictional force is equal to the second horizontal force

So

      [tex]F _k  =  m  *  g  *  \mu_k[/tex]

      [tex]650 =  95  *  9.8  *  \mu_k[/tex]

     [tex]\mu_k =  0.70[/tex]

Answer:

2 m/s

Explanation: Given that a flatbed car of a train moves 8 m/s to the east. A jogger runs along to top the flatbed car (which is not very safe) with a velocity of 6 m/s to the west.

Since the jogger is moving in an opposite direction to the direction of the train, and velocity is the distance covered in a specific direction, the jogger will be moving at a velocity relative to the velocity of the train.

Velocity = (8 - 6) m/s

Velocity = 2 m/s

Therefore, the jogger will be moving at the speed of 2 m/s

Answer:

They are written or edited by anyone

Explanation:

That's the flat-top marked ' B '.

It's 6 m/s.

Answer:

4.5 because just do the math and its 4.5

Answer:

D. A Molecule

Explanation:

The smallest particle of a compound that still has the properties of the compound is a molecule. It is composed of two or more bonded atoms.

The smallest part of a chemical compound that has all the properties of that compound is a molecule (option d)

In the world of chemistry, substances are composed of tiny units called atoms, and these atoms bond together to form chemical compounds.

Option A, a nucleus, refers to the central core of an atom and consists of protons and neutrons. While essential for an atom, a nucleus alone does not represent a complete chemical compound.

Option B, a mineral, is a naturally occurring inorganic substance with a specific chemical composition and a definite atomic structure. However, minerals are not the smallest parts of a chemical compound.

Option C, an atom, is the fundamental building block of matter. It consists of a nucleus (containing protons and neutrons) surrounded by electrons. While atoms are crucial for forming compounds, they are not the smallest unit that retains all the properties of a compound.

Therefore, the correct answer is Option D, a molecule. A molecule is a group of two or more atoms bonded together, representing the smallest part of a chemical compound that possesses all the characteristics and properties of that compound.

Hence the correct option is (d).

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Answer:

100m/s

Explanation:

velocity = displacement/time

The average velocity of the race car around the circular track in the given time is 62.8m/s.

Hence, option D) None of the above is the correct.

Average velocity is simply the displacement of a particle or object over time. It is the rate of change of position of an object with respect to time.

It is expressed as;

Velocity = displacement / time

It can also be expressed as;

Velocity = circumference / time = 2πr / t

Given the data in the question;

To determine the average velocity, we substitute our values into the expression above.

V = 2πr / t

V = ( 2 × 3.14 × 500m ) / 50s

V = 3140m / 50s

V = 62.8m/s

The average velocity of the race car around the circular track in the given time is 62.8m/s.

Hence, option D) None of the above is the correct.

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Answer:

10 s

Explanation:

Given:

Δx = 100 m

v₀ = 0 m/s

a = 2 m/s²

Find: t

Δx = v₀ t + ½ at²

100 m = (0 m/s) t + ½ (2 m/s²) t²

t = 10 s

Answer:

number 2!

Explanation:

Answer:

2s to 4s

Explanation:

Since the graph measures acceleration over time, when the line does not move up or down is when you can see a constant velocity.

The answer to your question is law.

Answer:

Explanation:

Muons in the atmosphere, a component of cosmic rays. Atmospheric muons are an essential component of cosmic ray showers. When a high energy primary particle coming from space collides with a nucleus of the upper atmosphere, it generates a spray of particles which later interact in their turn.

Answer Multiply the acceleration by time to obtain the velocity change: velocity change = 6.95 * 4 = 27.8 m/s . Since the initial velocity was zero, the final velocity is equal to the change of speed.

​  

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The minus sign indicates the average velocity is also toward the rear of the plane.

The average velocity of an object does not tell us anything about what happens to it between the starting point and ending point, however. For example, we cannot tell from average velocity whether the airplane passenger stops momentarily or backs up before he goes to the back of the plane. To get more details, we must consider smaller segments of the trip over smaller time intervals. For instance, in the figure below, we see that the total trip displacement,

Answer:

bdjdiosfjigjdigjtrht <3

Explanation:

Answer:

Heat

Explanation:

Hello. This question is incomplete. The full question is:

You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 29.7 N and the spring scale reads 17.6 N.

What is the magnitude of the force that Earth exerts on the bag?

Answer:

47.3 N

Explanation:

the entire system shown in the question above is at rest. Which greatly facilitates the calculation that we must do. In this case, to measure the magnitude that the force of the earth has on the backpack, you only need to add the two forces that you already know in the system.

In that case, it would be, you should calculate:

F= 29.7 N+ 17.6 N

F= 47.3N

Answer:

D

Explanation:

Study habits include, how you prepare for assignments, what questions you ask your teacher, and How you take tests, all of these come under study habits, therefore the correct answer is option D.

The deliberate evidenced based quest and application of information and comprehension of the natural implications for society is what is known as research.

Science is a methodology of discovering more about the world.

People may contribute to the development of new knowledge through science and utilize it to promote their objectives.

A student's study habits include factors like how they approach tasks, questions they ask their professors, and how they prepare for the exam

Thus, the correct answer is option D.

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Explanation:

a plate with oceanic crust sinks beneath a plate with

continental crust is the answer

Answer:

A

Explanation:

a statement that can be tested through the scientific method

Answer:

D. renting retail space at a mall

Explanation:

Answer:

u need it now?

Explanation:

I'll answer it

Based on the diagram above, the organisms that are shown are elephants.

A species simply refers to a biological classification of related organisms that have the same (similar) characteristics and they are capable of mating (breeding) with one another in a cycle (different seasons).

Based on the diagram above, we can logically deduce that the organisms shown are species of elephants and they look similar due to the following points:

However, an obvious difference between them is the number of tusk.

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Answer:

2 days 2 hours or 50 hours

Explanation:

800/16=50

Answer:

From 9 to 10 sec the velocity is decreasing at a constant rate.

Change in V = 20 m/s - 30 m/s = -10 m/s

Since acceleration is constant from point E to point F (straight line)

and t = 9.5 sec is on this line

a = (20 m/s - 30 m/s) / 1 sec = -10 m/s^2  

The instantaneous acceleration of the object at time = 9.5 seconds is - 10 m/s².

Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting.

From t = 9 second to t =10 second the velocity of the object decreases at a constant rate.

Change in velocity of the object = final velocity - initial velocity

= 20 m/s - 30 m/s

= -10 m/s

time interval is = 10 sec - 9 sec = 1 sec.

Hence, acceleration of the object is: a = Change in velocity/ time interval

= - 10 m/s/1s

= -10 m/s²

Therefore,  the instantaneous acceleration of the object at time = 9.5 seconds is - 10 m/s².

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Answer:t would be 17 m/s

If we use V2 = V1 + a*t

Sub in 5 for v1

2m/s*2 for a

And

6 for t

That should give you the answer.

Answer:

it all depends on the protons and the neutrons of that element.

Answer:

The mass of cylinder made up of alloy of platinum iridium that is kept at international bureau of weights and measures is called one standard kilogram.

The system of seven fundamental quantities is called SI system .

Answer:

It is spinning, making the ball a little more airborn than the one that isn't spinning

Answer:

A spinning ball creates a Centrifugal Force because it is given the "energy" so to speak to spin. A ball that is not moving does not need any external energy to keep it still or, in other terms, at rest.

Explanation:

Answer:

[tex]4ms {}^{ - 2} [/tex]

Explanation:

We can use equation of motion to solve this

[tex]v = u + at \\ 40 = 0 + a(10) \\ a = 4m {s}^{ - 2} [/tex]

Answer:

Explanation:

Let us calculate the time of flight first using the formula;

Velocity = Displacement/Time

Time = Displacement/speed

Time = 10.0/3

Time = 3.33secs

Next is to calculate how far out from the edge of the cliff it will hit the water. To get that, we will use the equation of motion;

S= ut+1/2gt²

u is the initial velocity = 0m/s

g is the acceleration due to gravity = 9.81m/s

S = 0 + 1/2(9.81)(3.33)²

S = 4.905*3.33*3.33

S = 54.39m

Hence it will hit the water at 54.39m from the edge of the cliff

Answer:

Explanation:

Applying kinematic relations along vertical direction

[tex]y = V_0t + \frac{1}{2}a_yt^2[/tex]

where,

[tex]a_y = g[/tex]

therefore,

[tex]y = 0 + \frac{1}{2}gt^2[/tex]

The time taken

[tex]t = \sqrt{\frac{2y}{g}}\\\\t = \sqrt{\frac{2*10}{9.8}}\\\\t = 1.428s[/tex]

The horizontal distance

[tex]x = V_yt\\\\x = 3*1.428\\\\x = 4.28m\\\\[/tex]

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