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A box of mass 2 kg is placed on the roof...

A box of mass 2 kg is placed on the roof of a car. The box would remain stationary until the car attains a maximum acceleration. Coefficient of static friction between the box and the roof of the car is 0.2 and 1`g=10" ms"^(-2)`.
The maximum acceleration of the car, for the box to remain stationary, is

A

`8 ms^(-2)`

B

`6 ms^(-2)`

C

`4 ms^(-2)`

D

`2 ms^(-2)`

Text Solution

Verified by Experts

The correct Answer is:
D
f =` ma implies mu mg = `ma
`a = 0.2 xx 10 = 2 m//s^(2)`
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