Explanation
Force on particle along the cord = mgcosθ
Distance travelled by the particle =dcosθ, where d is the diameter or the vertical circle.
s=at22
⇒ t=√2sa.
Hence, t is independent of θ.
a=gcosθAB=2Rcosθ⇒v2=u2+2asv2=0+2(gcosθ)2Rcosθ⇒v2=4gRcos2θ⇒v=2√gRcosθ
Kinetic Energy, KE=12mv2
(where, m= mass of the body and v= velocity)
KE∝mv2
Kinetic energy can be increased by either increasing mass or velocity.
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