MEDIUM
JEE Main
IMPORTANT
Earn 100
Two bodies make an elastic head-on collision on a smooth horizontal table kept in a car. Do you expect a change in the result if the car is accelerated in a horizontal road because of the non-inertial character of the frame? Does the equation '' remain valid in an accelerating car? Does the equation '' remain valid in the accelerating car?
Important Questions on Centre of Mass, Linear Momentum, Collision
EASY
JEE Main
IMPORTANT
If the total mechanical energy of a particle is zero, is its linear momentum necessarily zero? Is it necessarily non zero?
MEDIUM
JEE Main
IMPORTANT
If the linear momentum of a particle is known, can you find its kinetic energy? If the kinetic energy of a particle is known can you find its linear momentum?
EASY
JEE Main
IMPORTANT
What can be said about the centre of mass of a uniform hemisphere without making any calculation? Will its distance from the centre be more than or less than ?
EASY
JEE Main
IMPORTANT
You are holding a cage containing a bird. Do you have to make less effort if the bird flies from its position in the cage and manages to stay in the middle without touching the walls of the cage? Does it make a difference whether the cage is completely closed or it has rods to let air pass?
EASY
JEE Main
IMPORTANT
A fat person is standing on a light plank floating on a calm lake. The person walks from one end to the other on the plank. His friend sitting on the shore watches him and finds that the person hardly moves any distance because the plank moves backward about the same distance as the person moves on the plank. Explain.
EASY
JEE Main
IMPORTANT
A high-jumper successfully clears the bar. Is it possible that his centre of mass crossed the bar from below it? Try it with appropriate figures.
EASY
JEE Main
IMPORTANT
Which of the two persons shown in figure is more likely to fall down? Which external force is responsible for his falling down?
EASY
JEE Main
IMPORTANT
Suppose we define a quantity 'Linear Momentum' as linear .
The linear momentum of a system of particles is the sum of linear momentum of the individual particles. Can we state the principle of conservation of linear momentum as 'linear momentum of a system remains constant if no external force acts on it'?
