A block of mass m is projected on a smooth horizontal circular track with velocity v. What is the average normal force exerted by the circular walls on the block during its motion from A to B?
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a
mv2R
b
mv2πR
c
2mv2R
d
2mv2πR
answer is D.
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Detailed Solution
Change in linear momentum of block |Δp|=2mvTime taken to move from A to B,Δt=πRvForce exerted on the block =ΔpΔt=2mv2πR