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Comprehension # 6 A 1 kg block is give...

Comprehension # 6
A `1 kg` block is given a velocity of `15 m//s` towards right over a very long rough plank of mass `2 kg` as shown in figure.

Momentum of both the blocks are equal at time `t =` ……. Second :-

A

`1.75`

B

`1.875`

C

`2.5`

D

`1.25`

Text Solution

Verified by Experts

The correct Answer is:
C
`v = u + at rArr 5 = 15 - (4) t rArr t = 2.5 sec`
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