Question

Which indicates what happens to the kinetic energy when the mass of a moving object increases?
Responses

The kinetic energy does not change.
The kinetic energy does not change.

The kinetic energy increases proportionally as the mass increases.
The kinetic energy increases proportionally as the mass increases.

The kinetic energy increases by the square of the same factor as the mass increases.
The kinetic energy increases by the square of the same factor as the mass increases.

The kinetic energy decreases by the same factor as the mass increases.
The kinetic energy decreases by the same factor as the mass increases.

Answer 1

The kinetic energy increases proportionally as the mass increases.

Reason: KE = 1/2 m v^2, so for fixed speed v, KE ∝ m. Doubling the mass doubles the kinetic energy, etc.