The angle between the centripetal force and tangential velocity is:
Correct answer: B. 90o
- A. 0o
- B. 90o
- C. 180°
- D. 60°
Explanation
Option B is correct.The angle between the centripetal force and tangential velocity is always 90 degrees tangential to the circle. The centripetal force is the force that keeps an object moving in a circular path. It is directed towards the center of the circle. The tangential velocity is the velocity of the object in a straight line. It is tangent to the circle. The centripetal force and tangential velocity are always perpendicular to each other. The angle between them is always 90 degrees. The tangential velocity is always tangent to the circle. The centripetal force is always directed towards the center of the circle. Therefore, the angle between the centripetal force and tangential velocity is always 90 degrees tangential to the circle.
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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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