Question

If a particle's speed increases, what happens to its kinetic energy?

Its kinetic energy increases.
Its kinetic energy totally disappears.
Its kinetic energy decreases.
Its kinetic energy stays the same.

Answer 1

The answer should be its kinetic energy increases.

The kinetic energy of a particle means how fast they move, the faster they move, the more kenetic energy they have. In addition, when it moves faster and have more kenetic energy, their temperature becomes higher too.

Therefore, the answer is the first one.