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A ball hits the floor and rebounds after an inelastic collision. In this case
A ball hits the floor and rebounds after an inelastic collision. In this case
- the momentum of the ball just after the collision is the same as that just before the collision
- the mechanical energy of the ball remains the same in the collision
- the total momentum of the ball and the earth is conserved (correct)
- the total energy of the ball and the earth is conserved
Two identical balls marked 2 and 3. in contact with each other and at rest on a horizontal frictionless table, are hit head-on by another identical ball marked 1 moving initially with a speed v as shown in the figure. Assume the collision is elastic, then mark out the correct statement.
Two identical balls marked 2 and 3. in contact with each other and at rest on a horizontal frictionless table, are hit head-on by another identical ball marked 1 moving initially with a speed v as shown in the figure. Assume the collision is elastic, then mark out the correct statement.
- Ball 1 comes to rest and ball 2 and 3 moves with speed v
- Ball 1 and 2 come to rest and ball 3 moves with speed v (correct)
- Each ball moves with speed v
- None of the above
A body starts moving from rest in straight line under a constant power source. Its displacement in time t is proportional to
A body starts moving from rest in straight line under a constant power source. Its displacement in time t is proportional to
- t^1/2
- t
- t^3/2 (correct)
- t^2
If the length of the string is l = 10/3 m , and ratio of maximum tension to minimum tension is 4:1 . Find the velocity at the highest point.
If the length of the string is l = 10/3 m , and ratio of maximum tension to minimum tension is 4:1 . Find the velocity at the highest point.
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