NEET Exam Model Paper 6

∵ At any angular position θ
T−mgcosθ=

mv2

r

⇒T=mgcosθ+

mv2

r

When mass is released from displaced position, θ starts decreasing and ‘v’ starts increasing. As result mg cosθ as well as

mv2

r

both increases. Hence graph will be (d), (c) is not acceptable because at t=0,T≠0
(b) is not acceptable because the variation is not linear.