The rear side of truck is open and a box of mass $$50$$ kg is placed at $$3.2$$ m 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 $$2.1$$ ms−$$2$$ the box falls off the truck after a time (g=10$$ ms−$$2)

Question

The rear side of truck is open and a box of mass $$50$$ kg  is placed at $$3.2$$ m 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 $$2.1$$ ms−$$2$$     the box falls off the truck after a time (g=10$$ ms−$$2)

Infinity Learn · Accepted Answer

a|$$=a$$−μkg       $$S=12a$$|$$t2$$⇒$$t2=2Sa$$|     $$t=2Sa$$|$$=2Sa$$−μkg     $$t=2$$×$$3.22.1$$−$$0.2$$×$$10=64=8S$$

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