You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. The ball has energy. Calculate it.
10.. A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby
weighs 12 N. The carriage has energy. Calculate it.

You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s.

The ball has KINETIC energy. Calculate it.

A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby

weighs 12 N. The carriage has POTENTIAL energy. Calculate it.

Explanation:

You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s.

The ball has KINETIC energy. Calculate it.

Calculate:

KE = 1/2mv^2=1/2(2.1kg)(30m/sec)^2= 945J

A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby

weighs 12 N. The carriage has POTENTIAL energy. Calculate it.

Calculate: PE = 2kg(9.8m/sec^2)21m = 411.6J

14

Explanation: Hope it is right