Subject :NSO Class : Class 6
Let ball P and ball Q both released from point O of their respective frictionless ramps as shown in the given figure. The time taken by both the balls to reach point O′ is recorded. If both the balls have travelled the same distance, then which of the following statements is/are correct about the time taken by the two balls?
I. Ball P takes a longer time than ball Q.
II. Ball Q takes a longer time than ball P.
III. Both the balls P and Q take the same time.
IV. Cannot be determined as the masses of both the balls are not given.
AI only
BII only
CIII only
DI, II, III and IV
If in the question frictionless ramp is mentioned then why does the explanation include friction change according to inclination of ramp?