Question

One cricket ball and One plastic ball are dropped from the same height. Which will reach the ground with(a) more energy, (b) less power?

Answer 1

Answer:

both reach at same time

Answer 2

Answer:

• When falling the two balls, the potential energy of ball would be changed into kinetic energy.  

The potential energy is given by following formula:

            $\text { Potential energy }=m g h$

• Acceleration due to gravity and height is same for both the balls. Therefore, the cricket ball will have more energy than the plastic ball.
• If a resistance and other factors were neglected, the time taken by the balls to reach the ground could be the same.

            $\text { Energy }=\frac{\text { Work done }}{\text { Time }}$

• As time is same, the ball which has less work they would have lesser energy. Hence, plastic ball would have lesser energy than the cricket ball.