A centripetal force acts on a ball of mass m = 1kg being swung in a...
A centripetal force acts on a ball of mass m = 1kg being swung in a circle of radius r = 1m at a speed of v = 200m/s. How much work does this force do?
Homework Answers
The centripetal force acts towards the center of the circle, therefore the force vector is always perpendicular to the displacement vector at any instant.
Work done is defined as the dot product of force and displacement, therefore, the dot product is zero.
Answer : Zero.
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