Concept explainers
Whether the work done on an object by external force is zero, if the object moves in a circular path.
Answer to Problem 1CQ
If the velocity is constant then the work done will be zero, otherwise there will be work done by external force.
Explanation of Solution
Write the expression for work done.
Here,
If the velocity is a constant then work done will be zero, since the accelerating force is radial, and motion is tangential, thus the above equation will be zero.
If the
Conclusion:
Therefore, the velocity is constant then the work done will be zero, otherwise there will be work done by external force.
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