A bus and a ball are moving with the same speed. To stop which one would require more force ?

An electron and a proton are moving with same speed . Which will have more wavelength ?

A ball of mass 'm' moves normal to a wall with a velocity 'u' and rebounde with the same speed. The change in momentum of the ball during the rebounding is

A ball of mass m moving with a velocity v undergoes an oblique elastic collision with another ball of the same mass m but at rest. After the collision if the two balls move with the same speeds , the angle between their directions of motion will be:

A bus moving on a level road with a velocity v can be stopped at a distance of x by the application of a retarding force F The load on the bus is increased by 25% by boarding the passengers. Now if the bus is moving with the same speed and if the same retarding force is applied the distance travelled by the bus before it stops is .

A billiard ball moving with a speed of 5 m//s collides with an identical ball, originally at rest. If the first ball stop dead after collision, then the second ball will move forward with a speed of:

Assertion : A bus moving due north takes a turn and starts moving towards east with same speed. There will be no change in the velocity of bus. Reason : Velocity is a vector-quantity.

Assertion : A ball of mass 100g hits a bat with a speed of 72km//hr and bounces back with the same speed in one second The force exerted by the bat on the ball is 4N Reason : It follows from F =ma .