Which has greater interita. A stone of mass 1 kg or a stone of mass 5 kg?

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?

A massless string of length 1.2 m, has a breaking strength of 2 kg wt. A stone of mass 0.4 kg, tied to one end of the string, is made to move in a vertical circle, by holding the other end in the hand. Can the particle describe the vertical circle? (Take g = 10 m s^-2 )

Which one is greater-the gravitational force of the earth on 1 kg iron or the force of gravitation applied by 1 kg on earth ?

Which is greater: 45 kg or 4500 g?

Give the magnitude and direction of the net force acting on a stone of mass 0.1kg:- lying on the floor of a train which is accelerating with 1 m s^-2 , the stone being at rest relative to the train.Neglect air resistance throughout.

Give the magnitude and direction of the net force acting on a stone of mass 0.1kg:- just after it is dropped from the window of a train accelerating with 1m s^-2 , Neglect air resistance throughout.