Question

A bowler tosses a ball without spin. The ball slides down the alley. At some point, friction with the alley makes the ball start to roll; eventually, it rolls without sliding. When the ball reaches this point, it is moving at a lower speed than the original toss. Use energy concepts to give two reasons for this change.

Answer 1

Answer: 1. mechanical energy to hear energy

2. Energy from potential energy to kinetic energy

Step-by-step explanation:

Reason one

While the ball was tossed a mechanical energy was used from the arm of the bowler to make the balL slide without rotating, as the ball rolls, the frictional force between the ball and the ground gives rice to hear energy. This lowers the speed of the ball

Reason two

The ball was initially at rest while sliding because it was moving with momentum so as the ball starts to roll without sliding it's energy will convert to kinetic energy from potential energy. This is responsible for lowering in speed

Answer 2

Step-by-step explanation:

There are two reasons for lowering the speed of the ball. They are as follows

1 ) In the beginning , the ball slides for a while . During this period , frictional force reduces its speed . Its energy is lost due to conversion into heat by friction. Once perfect rolling starts , this loss is stopped .

2 ) Friction , converts its linear kinetic energy into rotational kinetic energy as a result of which its linear kinetic energy is reduced , thus reducing its speed. Friction creates rotation in it which is at the cost of linear kinetic energy.