A girl weighing 25 kg stands on the floor. She exerts a downward force of 250 N on the floor. What force does the floor exert on her?

What is the force which produces an acceleration of 1 m/s² in a body of mass 1 kg?

Find the acceleration produced by a force of 5 N acting on a mass of 10 kg.

Name the physical quantity which makes it easier to accelerate a small car than a large car.

Fill in the following blanks with suitable words:

(a) To every action, there is an ………. and ……..reaction.

(b) Momentum is a ……..quantity. Its unit is …………….

(c) Newton’s second law of motion can be written as Force = mass × …………… or Force = …………….. or change of …………

(d) Forces in a Newton’s third law pair have equal …………… but act in opposite …………

(e) In collisions and explosions, the total ………… remains constant, provided that no external ………… acts.