A conical pendulum consists of a 200g body at the end of a 40cm long string making 10degrees with the vertical

Find a) Velocity of the body
b) Tension in the string

1 answer

tan 10 = m v^2/R / mg = v^2/(R g)
but R/0.40 = sin 10
so R = 0.40 sin 10

T = m sqrt [(v^2/R)^2 + g^2]