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The diagram shows an object released fro...

The diagram shows an object released from point X and travelling on a frictionless track. If a heavier object is taken in consideration then

(i) It will move with a greater speed at Y.
(ii) The speed of the object at M is `10 ms^(-1)`.

A

Only (i) is true.

B

Only (ii) is true.

C

Both (i) and (ii) are true.

D

Neither (i) nor (ii) is true.

Text Solution

Verified by Experts

The correct Answer is:
B
The speed of the object is affected by the height from which it is released.
`mgh = (1)/(2) mv^(2)` or `v = sqrt(2gh) or v prop sqrt(h)`
So, heavier object will not move with a greater speed at Y. Speed of the object at M:
Loss in PE = KE
`mg(25-20)=(1)/(2)mv^(2) " " :.v^(2)=100 or v=10 ms^(-1)`
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