A particle of mass m is attached to a massless string of length l and is oscillating in a vertical plane with the other end of the string fixed to a rigid support.
The tension in the string at a particular instant is kmg.
a) k can never be greater than 1
b) k can never be less than 1
c) k can never be equal to 1
d) k can never be greater than 3
Answer d.
Kindly explain
