If a lift can move a load of 5000 kg with a speed of `1ms^-1`, where is the power of the lift?

A force of 10 N moves a body with a constatn speed of 2ms^-1 . Calculate the power of the body?

Metallic wire 1m in length is moving normally across a field of 0.1 T with a speed of 5 ms^-1 . Find the e.m.f between the ends of the wire.

A girl riding a bicycle along a straight road with a speed of 5 ms^-1 throws a stone of mass 0.5 kg which has a speed of 15 ms^-1 with respect to the ground along her direction of motion. The mass of the girl and bicyle is 50 kg. Does the speed of the bicycle change after the stone is thrown? What is the change in speed, if so?

If a man lifts a load up with the help of rope such that it raises the load of mass 50 kg to a height of 20 m in 100 seconds. Find the power of man. (Take g = 10ms^-2 )

A man of mass 70 kg stands on a weighing scale in a lift which is moving :- upwards with a uniform speed of 10 m s^-1 , what would be the reading on scale?

A boy standing on a stationary lift (open from above) throws a ball upwards with the maximum initial speed he can, equal to 49 m s^-1 . How much time does the ball take to return to his hands? If the lift starts moving up with a uniform speed of 5 m s^-1 and the boy again throws the ball up with the maximum speed he can, how long does the ball take to return to his hands ?

A bomb of mass 10 kg at rest explodes into two parts of 3 kg and 7 kg.If smaller part moves with a speed 14 m s^(-1) towards east ,find the velocity of the heavier part.

A cricket catches a ball of mass 150 g in 0.1 s moving with a speed of 20 ms^-1 . Then the experiences a foce of