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 correctly describes his kinetic energy during this time?(1 point)%0D%0AResponses%0D%0A%0D%0AHis kinetic energy would remain the same for the whole fall as long as he lost no mass.%0D%0AHis kinetic energy would remain the same for the whole fall as long as he lost no mass.%0D%0A%0D%0AHis kinetic energy was positive at first, but it decreased to zero when he stopped accelerating.%0D%0AHis kinetic energy was positive at first, but it decreased to zero when he stopped accelerating.%0D%0A%0D%0AHis kinetic energy increased while his speed increases, then it became constant.%0D%0AHis kinetic energy increased while his speed increases, then it became constant.%0D%0A%0D%0AHis kinetic energy increased quickly at first, then it increased at a constant rate.

Question

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 correctly describes his kinetic energy during this time?(1 point)%0D%0AResponses%0D%0A%0D%0AHis kinetic energy would remain the same for the whole fall as long as he lost no mass.%0D%0AHis kinetic energy would remain the same for the whole fall as long as he lost no mass.%0D%0A%0D%0AHis kinetic energy was positive at first, but it decreased to zero when he stopped accelerating.%0D%0AHis kinetic energy was positive at first, but it decreased to zero when he stopped accelerating.%0D%0A%0D%0AHis kinetic energy increased while his speed increases, then it became constant.%0D%0AHis kinetic energy increased while his speed increases, then it became constant.%0D%0A%0D%0AHis kinetic energy increased quickly at first, then it increased at a constant rate.

Answer 1

The statement that correctly describes his kinetic energy during this time is: His kinetic energy increased while his speed increases, then it became constant.

Answer 2

The correct statement describing the skydiver's kinetic energy during this time is:

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

Answer 3

To determine the correct statement about the skydiver's kinetic energy during this time, we need to understand the relationship between kinetic energy and speed. Kinetic energy (KE) is given by the equation KE = 1/2 * mass * speed^2, where mass is the mass of the skydiver and speed is the magnitude of the velocity.

Looking at the given information, we can break it down into different phases:

1. The skydiver jumps out of the plane and begins to accelerate. At this point, his speed increases to 20 m/s. Since the speed is increasing, his kinetic energy is also increasing.

2. The skydiver's speed continues to increase to 30 m/s. Again, his kinetic energy is still increasing because his speed is increasing.

3. After reaching a speed of 30 m/s, the skydiver's acceleration slows down until he reaches a constant speed of 50 m/s. At this point, his speed is no longer changing, and thus his kinetic energy remains constant. However, it is important to note that the kinetic energy is still positive.

Therefore, the correct statement is: "His kinetic energy increased while his speed increases, then it became constant."