The rear side of truck is open and a box of mass $$50kg$$ is placed at $$3.2m$$ away from the open end. The $$co-efficient$$ of friction between the box and the surface is $$0.2$$. If the truck starts from rest and moves on a straight road with acceleration $$2.4ms$$−$$2$$ the box falls off the truck after a time (g=10ms$$−$$2)

Question

The rear  side of truck is open and a box of mass $$50kg$$ is placed at $$3.2m$$ away from the  open end. The $$co-efficient$$ of friction between the box and the surface is  $$0.2$$. If the truck starts from rest and moves on a straight road with  acceleration $$2.4ms$$−$$2$$      the box falls off the truck after a time (g=10ms$$−$$2)

Infinity Learn · Accepted Answer

$$a1=a$$−μkg                 $$S=12a1t2$$⇒$$t2=2sa1$$                 $$t=2$$×$$3.22.4$$−$$0.2$$×$$10=16=4sec$$

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