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A small block of mass 1kg is placed over...

A small block of mass 1kg is placed over a plank of mass 2kg. The length of the plank is 2 m. coefficient of friction between the block and the plnak is 0.5 and the ground over which plank in placed is smooth. A constant force F=30N is applied on the plank in horizontal direction. the time after which the block will separte from the plank is `(g=10m//s^(2))`

A

0.89s

B

1.2s

C

0.62s

D

1.6s

Text Solution

Verified by Experts

The correct Answer is:
a
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