Question

In uniform circular motion which of the following is directed along axis of rotation?
1) velocity
2) centripetal acceleration
3) angular velocity
4) displacement

Answer 1

In physics, circular motion is a movement of an object along the circumference of a circleor rotation along a circular path. It can be uniform, with constant angular rate of rotation and constant speed, or non-uniform with a changing rate of rotation. The rotation around a fixed axis of a three-dimensional body involves circular motion of its parts. The equations of motion describe the movement of the center of mass of a body.



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2 centripetal acceleration

Answer 2

The uniform circular motion is done by centripetal acceleration and angular velocity. Thus option (2) and (3) are the correct option.

• In a uniform circular motion when an object is revolving around a circular path.
• Centripetal force is acting on it towards the axis of rotation and due to this the object has centripetal acceleration.
• Which is always directed along axis of rotation, angular velocity is also pointed towards axis of rotation.
• Centripetal and angular velocity always acts on axis of rotation.

Hence Centripetal acceleration and angular velocity are directed along axis of rotation.