What is wrong about centripetal and centrifugal forces?
Correct answer: B. Both perform work
- A. They act on the same body
- B. Both perform work
- C. Their directions are opposite
- D. All of these
Explanation
Option B is correct.No, the centripetal and centrifugal forces do not both perform work.Centripetal force is the force that keeps an object moving in a circular path. It is directed towards the center of the circle. The centripetal force is necessary to overcome the object's inertia, which wants to keep it moving in a straight line. The centripetal force is always perpendicular to the object's velocity.Centrifugal force is an apparent force that acts on an object moving in a circular path. It is directed outward, away from the center of the circle. The centrifugal force is not a real force, but rather a consequence of inertia. The centrifugal force is equal in magnitude to the centripetal force, but it is in the opposite direction. W= F,dW = Fd cosθ = Fd cos90° = Fd (0) = 0The centripetal and centrifugal forces are perpendicular to velocity. As the displacement is parallel to the velocity. So the angle between the displacement and the forces is 90°.
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