Why do you fall in the forward direction when a moving bus brakes to a stop and fall backwards when it accelerates from rest?
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?
What is the momentum of an object of mass m, moving with a velocity v?
(a) (mv)2 (b) mv2 (c) ½ mv2 (d) mv
In the following example, try to identify the number of times the velocity of the ball changes:-
“A football player kicks a football to another player of his team who kicks the football towards the goal. The goalkeeper of the opposite team collects the football and kicks it towards a player of his own team”.
Also identify the agent supplying the force in each case.
- Science Textbook for Class 9