Uniform Circular Motion

Q.

Write the difference between uniform acceleration and non uniform acceleration.

Q. An object travels around a circle of radius $6m$ with speed $3\pi m{s}^{-1}$. Find the distance and displacement after $3s$.

1. $9\pi m,6\sqrt{2}m$
2. $12\pi m,6\sqrt{2}m$
3. $12\pi m,0m$
4. $9\pi m,0m$

Q.

Define circular motion.

Q.

Uniform circular motion examples

Q.

In $10minutes$, a car with a speed $60km{h}^{-1}$ travels a distance of:

1. $6km$

2. $600km$

3. $10km$

4. $1km$

Q.

In a uniform circular motion, which of the following is true?

1. Speed remains constant and velocity changes continuously.

2. Neither velocity nor speed remains constant.

3. Velocity is constant and speed is changing.

4. Velocity and speed both remain constant.

Q.

Explain why, the motion of a body which is moving with constant speed in a circular path is said to be accelerated.

Q.

Is the uniform circular motion accelerated ? Give reasons for your answer.

Q.

What is the speed of the Earth during a revolution?

Q.

A cyclist goes around a circular track once every 2 minutes . If the radius of a circle is 110 m calculate the speed and velocity.

Q.

The circular motion of a particle with constant speed is

1. Periodic but not simple harmonic

2. Simple harmonic but not periodic

3. Periodic and simple harmonic

4. Neither periodic nor simple harmonic

Q.

State an important characteristic of uniform circular motion. Name the force which brings about uniform circular motion.

Q.

Is the uniform circular motion accelerated?

Q.

A runner completes one round of a circular track of diameter 400 m in 40 s. What is the distance covered and the displacement at the end of 2 minutes 20 s?

1. 200 m

2. 400 m

3. 100 m

4. 800 m

Q.

What is the banking of roads? Why is banking necessary for a curved road?

Q. In a uniform circular motion velocity of the particle is________, and its speed is __________.

1. constant, constant
2. varying, constant
3. constant, varying
4. varying, varying

Q.

A satellite goes round the earth in a circular orbit with constant speed. Is the motion uniform or accelerated ?

Q.

Why is uniform circular motion known as an accelerated motion?

Q.

An object may have :-

A) varying speed without having varying velocity.

B) varying velocity without having varying speed.

C) non zero acceleration without having varying velocity.

D) non zero acceleration without having varying speed.

Explain your answer.

Q.

Write the formula to calculate the speed of a body moving along a circular path of radius r whe it has completed N revolutions in time t

Q.

What type of motion is represented by the tip of the 'seconds' hand' of a watch? Is it uniform or accelerated?

Q.

Can average speed of moving object be zero?

Q. What happens to a body undergoing a uniform circular motion?

1. Its speed changes but velocity remains the same.
2. Both speed and velocity changes.
3. Both speed and velocity do not change.
4. Its velocity changes but speed remains the same.

Q. Which physical quantity change continuously during uniform circular motion

Q. Consider a particle moving with constant speed such that magnitude of its acceleration is constant in magnitude and always perpendicular to its velocity. What can you say about its motion?

1. It is moving in some arbitrary path.
2. It is moving in a straight line.
3. It is moving in a circle.
4. It is at rest.

Q.

When a car runs on a circular track with a uniform speed, its velocity is said to be changing. This is because :

(a) the car has a uniform acceleration

(b) the direction of car varies continuously

(c) the car travels unequal distances in equal time intervals

(d) the car travels equal distances in unequal time intervals

Q.

Name the type of motion in which a body has a constant speed but not constant velocity.

Q. When a planet moves around the sun, it's
a. areal velocity is constant
b. linear velocity is constant
c. angular velocity is constant
d. all the velocities are constant

Q.

What are the two kinds of rotary motion?

Q. Explain how is it possible for an object to move with constant speed but with uniform acceleration