The direction of centripetal force is:
Correct answer: A. Towards the center
- A. Towards the center
- B. Along the tangential velocity
- C. Away from center
- D. Along the axis of rotation
Explanation
Option A is correct. The direction of the centripetal force is towards the centre of the circle. The centripetal force is the force that keeps an object moving in a circular path. The force is always directed towards the centre of the circle, regardless of the direction of the object's motion. The centripetal force is given by the following equation:Fc = mv²/r where:Fc is the centripetal force (N).m is the mass of the object (kg).v is the speed of the object (m/s).r is the radius of the circle (m).The centripetal force is always perpendicular to the object's velocity. This means that the centripetal force does not do any work on the object. The work done by a force is given by the following equation: W = F * d.
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About Angular and Linear Quantities
Rotational motion relates angular displacement, angular velocity and angular acceleration to linear displacement, tangential velocity and tangential acceleration through the radius. Questions use radians, v equals r omega and tangential acceleration, while distinguishing tangential velocity from centripetal acceleration and angular quantities from their linear counterparts.
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