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))

A ball of mass 1 kg moving with a velocity of "0.4 ms"^(-1) collides with another stationary ball. After the collision, the first ball moves with a velocity of 0.3ms^(1) in a direction making an angle of 90^(@) with its initial direction. The momentum of the second ball after the collision will be (in kg ms^(-1) )

A ball of mass 1 kg moving with a velocity of "0.4 ms"^(-1) collides with another stationary ball. After the collision, the first ball moves with a velocity of 0.3ms^(1) in a direction making an angle of 90^(@) with its initial direction. The momentum of the second ball after the collision will be (in kg ms^(-1) )

A bird is moving with velocity 10 ms?^(-1) in a direction making an angle of 60^@ with vertical upward. Represent the velocity vector in rectangular form.

A bird moves with velocity 20m s^(-1) in a direction making an angle of 60^(@) with vertical upward .Represent the velocity vector in a rectangular form.

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 projectile is thrown in the upward direction making an angle of 60^@ with the horizontal with a velocity of 140 ms^-1 . Then the time after which its velocity makes an angle 45^@ with the horizontal is (Acceleration due to gravity g=10 ms^-2 )

The escape velocity for a body projected vertically upwards from the surface of the earth is 11.2 km s^(-1) . If the body is projected in a direction making an angle 45^@ with the vertical, the escape velocity will be