Speed is the rate at which something covers a distance; velocity is the same but it takes into account whether it goes forwards or backwards; and acceleration is the rate of an increase in speed.
Answer:
Part a)

Part b)

Part C)
This is loss in terms of thermal energy due to collision with the floor
Explanation:
Part a)
Since we know that the ball rises up by 65% of initial height
so after first bounce it will lose 35% of its initial energy
so we will have

Energy Loss = 0.35 mgH[/tex]


Part b)
Energy of the ball after first bounce

energy of ball after 2nd Bounce

energy of the ball after 3rd bounce



Now we will have energy loss in fourth bounce given as



Part C)
This is loss in terms of thermal energy due to collision with the floor