Question 1

How much energy will be transferred to the kinetic store if three times the amount of work is done on kicking a football?

Accepted Answer

Three times as much energy.

Answer

Nine times as much energy.

Answer

The same amount of energy.

Question 2

If friction and air resistance are ignored, how much energy is dissipated by a toy car moving across a table?

Accepted Answer

None of the car's energy.

Answer

A tiny amount of the car's energy.

Answer

All of the car's energy.

Answer

Most of the car's energy.

Question 3

What happens to the amount of energy in the kinetic store of a ball if it is moving at two times the speed?

Accepted Answer

The amount of energy in the kinetic store is four times bigger.

Answer

The amount of energy in the kinetic store does not change.

Answer

The amount of energy in the kinetic store is two times bigger.

Question 4

What is kinetic energy?

Accepted Answer

The amount of energy an object has that is in its kinetic store.

Answer

The total amount of energy that a moving object has.

Answer

The type of energy that is in the kinetic store.

Answer

The type of energy an object has because it is moving.

Question 5

What is the kinetic energy of a discus of mass 2 kg moving at a speed of 8 m/s?

Accepted Answer

64 j

Question 6

What is the mass of a javelin that has a kinetic energy of 72 J and a speed of 12 m/s?

Accepted Answer

1

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