question_answer

A ball moves in a frictionless inclined table without slipping. The work done by the table surface on the ball is

A)  positive         

B)  negative

C)  zero             

D)  None of these

Correct Answer: C

Solution :

 Force applied by the surface of the inclined table of the ball is normal reaction N. Work done by the table on the ball [Angle between normal reaction N and displacement s is \[{{90}^{o}}\]] \[\therefore \] \[W=0\]