A wildlife keeper is trying to catch an escaping rabbit. Who has the greater kinetic energy, the rabbit or the wildlife keeper?

Question

(1 point)
Responses

The wildlife keeper because they have a greater mass.
The wildlife keeper because they have a greater mass.

The rabbit because it has less mass.
The rabbit because it has less mass.

Neither one because they are moving at the same speed.
Neither one because they are moving at the same speed.

The wildlife keeper because they speed up and catch the rabbit.

Answer 1

The correct response is:

The wildlife keeper because they have a greater mass.

Kinetic energy is calculated using the formula \( KE = \frac{1}{2} mv^2 \), where \( m \) is mass and \( v \) is velocity. If the wildlife keeper has a greater mass than the rabbit (assuming they are moving at a similar speed), they would have greater kinetic energy.

Answer 2

A skydiver jumps out of a plane and begins to accelerate. His speed increases to 20 m/s, then 30 m/s. His acceleration slows until he reaches a constant speed of 50 m/s. Which statement accurately describes his kinetic energy while falling?(1 point)
Responses

His kinetic energy increased while his speed increases, then it became constant.
His kinetic energy increased while his speed increases, then it became constant.

His kinetic energy increased quickly at first, then it increased at a constant rate.
His kinetic energy increased quickly at first, then it increased at a constant rate.

His kinetic energy would remain the same for the whole fall as long as he lost no mass.
His kinetic energy would remain the same for the whole fall as long as he lost no mass.

His kinetic energy was positive at first, but it decreased to zero when he stopped accelerating.

Answer 3

The correct response is:

His kinetic energy increased while his speed increased, then it became constant.

As the skydiver's speed increases while falling (from 20 m/s to 30 m/s), his kinetic energy also increases. Once he reaches a constant speed of 50 m/s, his kinetic energy becomes constant as long as his speed and mass remain unchanged.