A boy of mass 50 kg standing on ground exerts a force of 500 N on the ground. The force exerted by the ground on the boy will be:

A. 50 N B. 25000 N

C. 10 N D. 500 N

According to the third law of motion, action and reaction:

A. Always act on the same body but in opposite directions

B. Always act on different bodies in opposite directions

C. Have same magnitudes and directions

D. Act on either body at normal to each other

The unit of measuring momentum of a moving body is:

A. m s^-1 B. kg m s^-1

C. kg m s^-2 D. Nm² kg^-2

A Honda City car, A Maruti Alto car, A Tata Nano car and a Mahindra Scorpio car, all are running at the same speed of 50 m/s under identical conditions. If al these cars are hit from behind with the same force and they continue to move forward, the maximum acceleration will be produced in: Mass of the different vehicles: Honda City – 1150Kg, Maruti Alto-720Kg, Tata Nano-600Kg,Mahindra Scorpio-2510Kg

A. Honda City B. Maruti Alto

C. Tata Nano D. Mahindra Scorpio

The acceleration produced by a force of 5 N acting on a mass of 20 kg in m/s2 is:

A. 4 B. 100

C. 0.25 D. 2.5