Table of Contents

- 1 Why is the motion of a body moving in a circular path with a constant speed called accelerated motion?
- 2 Why is the motion of the stone in the circular path considered as an accelerated motion?
- 3 Can a body move on a curved path without having acceleration?
- 4 What keeps the stone moving along the circular path?
- 5 Is direction of motion is fixed in circular motion?
- 6 What is tangential acceleration formula?
- 7 Can a stone move with a uniform acceleration?
- 8 Which is parallel to the surface and opposite to the motion?

## Why is the motion of a body moving in a circular path with a constant speed called accelerated motion?

Uniform circular motion is accelerated because the velocity changes due to continuous change in the direction of motion. Thus, for a body moving in a circular path at a constant speed, its velocity changes continuously. The change in velocity gives rise to an acceleration in the moving body.

**What is the direction of acceleration of a stone when whirled in a circular path?**

The direction of acceleration of stone is towards the centre of the circular path. Force of tension in the string provides the centripetal force required for circular motion.

### Why is the motion of the stone in the circular path considered as an accelerated motion?

When a body or object moves along a circular path, then its direction of motion or direction of speed keeps changing continuously. Since, the velocity changes with the continuous change in direction, therefore, the motion along a circular path is said to be accelerated.

**What is the direction of velocity of an object moving along a circular path?**

Answer: Velocity always changes in circular motion and so, direction also changes. Direction will be along the tangent of radius of the circle towards the direction of motion.

## Can a body move on a curved path without having acceleration?

No, a body cannot move on a curved path without acceleration because while moving on a curved path, the velocity of the body changes with time.

**Is circular motion an acceleration motion class 9?**

In a circular motion, there is a continuous change in the direction of motion. Therefore, circular motion is an accelerated motion.

### What keeps the stone moving along the circular path?

A centripetal force is a net force that acts on an object to keep it moving along a circular path.

**Is the stone moving with a uniform acceleration?**

2) Although the stone is rotating with uniform speed, its direction keeps on changing. Hence, the stone is said to be moving with uniform acceleration. The direction of acceleration is towards the center of the circle. Its direction is opposite to the centripetal force, i.e. away from the center.

## Is direction of motion is fixed in circular motion?

Explanation: In circular Motion , direction of motion is not fixed as body keeps revolving. Also , acceleration is not zero as velocity is changing. Now , the velocity is not changing due to change in magnitude but due to change in direction.

**What can you say about objects moving in circular motion?**

Uniform circular motion can be described as the motion of an object in a circle at a constant speed. As an object moves in a circle, it is constantly changing its direction. An object undergoing uniform circular motion is moving with a constant speed. Nonetheless, it is accelerating due to its change in direction.

### What is tangential acceleration formula?

It is equal to the angular acceleration α, times the radius of the rotation. tangential acceleration = (radius of the rotation)(angular acceleration) atan = rα atan = tangential acceleration. r = radius of the object’s rotation.

**What is the direction of the velocity?**

The direction of the velocity vector is simply the same as the direction that an object is moving. It would not matter whether the object is speeding up or slowing down. If an object is moving rightwards, then its velocity is described as being rightwards.

## Can a stone move with a uniform acceleration?

(ii) Yes, the stone is moving with uniform acceleration. The acceleration acts along the tangent drawn at that point of the circle. (iii) Centrifugal force acts on the hand and it is acting away from the centre of the circular path.

**How is a stone of mass rotated in a circular path?**

A stone of mass m is rotated in a circular path with a uniform speed by tying a strong string with the help of your hand. Answer the following questions: (i) Is the stone moving with a uniform or variable speed? (ii) Is the stone moving with a uniform acceleration? In which direction does the acceleration act?

### Which is parallel to the surface and opposite to the motion?

It is parallel to the surface and opposite to the motion. -Tension: pull on a body directed away from the body along a massless cord. IV. Newton’s third law: When two bodies interact, the forces on the bodies from each other are always equal in magnitude and opposite in direction.

**How does acceleration work in a circular path?**

The acceleration acts along the tangent drawn at that point of the circle. (iii) Centrifugal force acts on the hand and it is acting away from the centre of the circular path. Was this answer helpful?