Question

Kinetic energy, with any reference, must be

• A. negative
• B. zero
• C. positive
• D. both (b) and (c)

Answer 1

Answer: (C)

positive

Answer 2

Kinetic energy is equal to $\frac{1}{2}\times mv^{2} ,$ where $v$ is velocity and its square is always positive. Therefore kinetic energy is always positive.