A box of mass $m$ kg is placed on the rear side of an open truck accelerating at $t\ ms^{- 2}$. The coefficient of friction between the box and the surface below it is 0.4. The net acceleration of the box with respect to the truck is zero. The value of $m$ is [Given $g = 10\ ms^{- 2}$]

Question

Dr. Abubacker · Accepted Answer

(d) Pseudo force on the block $= m\  	imes 4$ N (backward)
Force of friction = 0.4 $	imes m 	imes 10$ N (forward)
Equating , $m 	imes 4 = 0.4 	imes m 	imes 10 = 4m\ $
Clearly the equation holds good for all values of $m$

Q. A box of mass $m$ kg is placed on the rear side of an open truck accelerating at $t\ ms^{- 2}$. The coefficient of friction between the box and the surface below it is 0.4. The net acceleration of the box with respect to the truck is zero. The value of $m$ is [Given $g = 10\ ms^{- 2}$]

Explanation

Reviewed by Dr. Abubacker

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