When a body is in a a state of motion it tends to keep moving. If it is at rest it tends to remain at rest; This property of an object is called its inertia. There is a resistance offered by an object to change its state of motion.
It is the product of mass and velocity of a body.
P = mv
Shaalaa.com | Inertia
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?
Why do you fall in the forward direction when a moving bus brakes to a stop and fall backwards when it accelerates from rest?
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.
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