Questions
A block is released from rest from point A on a smooth track, whose cross section in vertical plane is quarter of a circle of radius ‘R’. The value of for which the contact force between block and surface is equal to the weight of block is
detailed solution
Correct option is D
N−mg sinθ=mv2R=mR2gRsinθ; (V2=2gh; h=rsinθ)⇒N=3mgsinθ⇒θ=sin−113 if N = mgTalk to our academic expert!
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A car travels 8 km along east, then 15 km along north and then , km towards south-west. What will be the displacement from the starting point ?
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