A) force and displacement are perpendicular to each other
B) the force is always away from the centre
C) there is no displacement
D) there is no net force
Correct Answer: A
Solution :
When a body moves on a circular path then force and distance are perpendicular to each other. Therefore, work done by the force is \[W=F\,.\,\,d\cos \theta \] \[=F\,.\,d\,\cos \,\,{{90}^{o}}\] \[(\because \,\,\theta ={{90}^{o}})\] \[=0\] \[(\because \,\cos \,\,{{90}^{o}}=0)\]
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