List of top Science Questions on Newton’s First Law Of Motion asked in CBSE Class IX

A hockey ball of mass 200 g traveling at 10 m s^–1 is struck by a hockey stick so as to return it along its original path with a velocity at 5 m s^–1. Calculate the magnitude of the change of momentum that occurred in the motion of the hockey ball by the force applied by the hockey stick.

A truck starts from rest and rolls down a hill with a constant acceleration. It travels a distance of 400 m in 20 s. Find its acceleration. Find the force acting on it if its mass is 7 tonnes (Hint: 1 tonne = 1000 kg.)

A batsman hits a cricket ball which then rolls on a level ground. After covering a short distance, the ball comes to rest. The ball slows to a stop because

Explain why some of the leaves may get detached from a tree if we vigorously shake its branch.

Which of the following has more inertia: (a) a rubber ball and a stone of the same size? (b) a bicycle and a train? (c) a five-rupees coin and a one-rupee coin?