. A box is kept in the rear of a truck that is travelling on a level road. The coefficient of sliding friction between box and truck bed is 1/3. The driver suddenly applies the brakes, producing a deceleration g/2. Acceleration of box with respect to truck is:

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g/3

g/2

g/6

5g/6

answer is C.

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Detailed Solution

While solving question with respect to truck's frame of reference, we must apply pseudo force as it is accelerating.∴F=−mg3+mg2=mg6⇒a=g6

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