Impulsive Forces in Collision
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A ball of mass 0.4 kg moving with uniform speed of 2 ms−1 strikes normally a wall and rebounds. Assuming the collision to be elastic and the time of contact of the ball with the wall as 0.4s, find the force exerted on the ball
1 N
2 N
3 N
4 N
A lead ball strikes a wall and falls down but a tennis ball having the same mass and velocity striking the wall, bounces back. Check the correct statement.
The momentum of the lead ball is greater than that of the tennis ball
The lead ball suffers a greater change in momentum compared with the tennis ball
The tennis ball suffers a greater change in momentum as compared with the lead ball
Both suffer an equal change in momentum
A body of mass 'm' collides against a wall with a velocity 'v' and retraces its path with the same speed. The change in momentum is (take initial direction of velocity as positive)
Zero
Mv
- 2 Mv
2Mv
- Stone A will break the plank ; Stone B will not
- Stone B will break the plank ; Stone A will not
- Both will be able to break the plank
- None of them will be able to break the plank
Two balls at same temperature collide. What is conserved?
Temperature
Velocity
Kinetic energy
Momentum
A lead ball strikes a wall and falls down, a tennis ball having the same mass and velocity strikes the wall and bounces back. Check the correct statement
The momentum of the lead ball is greater than that of the tennis ball
The tennis ball suffers a greater change in momentum as compared with the lead ball
Both suffer an equal change in momentum
The lead ball suffers a greater change in momentum compared with the tennis ball
A block of mass 'm' and a pan of equal mass are connected by a string going over a smooth light pulley as shown in figure. Initially the system is at rest when a particle of mass m falls on the pan and sticks to it. If the particle strikes the pan with a speed 'v' find the speed with which the system moves just after the collision.
v/2
v/3
v/6
2v/3