Question

A simple pendulum is oscillating with an angular amplitude 60°.If mass of bob is 50 gram the tension in the string at mean position is(g=10m/s2)

Answer 1

max ke = max Pe = m g h
h = r (1-cos 60) = r/2
so max (1/2) m v^2 = m g r/2
max v^2 = g r

T = m g + m v^2/r
T = m (g + g) = 2 m g = 2(.05)(10)
T = 1 Newton

Answer 2

Super