A girl of mass 40 kg sits in a swing formed by a rope of 6 m length. A person pulls the swing to a side so that the rope makies an angle of `60^(@)` with the vertical. What is the gain in potential energy of the girl ?

A girl of mass 40kg sits on a swing formed by a rope 6m long. A person pulls the swing to a side so that the rope makes an angle of 60^(@) with vertical . What is the gain in P.E. of the girl.

A bob of mass 2 kg hangs from a string of length 5 m . It swings from its rest position to one of the sides so that the string makes an angle of 60^(@) with the vertical Calculate the gain in potential energy of the bob .

A 50 kg girl is swinging on a swing from rest. Then, the power delivered when moving with a velocity of 2ms^(-1) upwards in a direction making an angle 60^(@) with the vertical is

A 50 kg girl is swinging on a swing from rest. Then, the power delivered when moving with a velocity of 2ms^(-1) upwards in a direction making an angle 60^(@) with the vertical is

A girl of mass 50 kg swinging on a cardle. If she moves with a velocity of 2 ms^(-1) upwards in a direction making an angle 60^(@) with the vertical, then the power generated is (g= 9 . 8 ms^(-2))