Question

When the mass and velocity of the body are doubled, what happens to its kinetic energy?

• A. It gets doubled
• B. It gets quadrupled
• C. It becomes eight times
• D. It becomes one fourth

Answer 1

The correct option is C It becomes eight times

K.E = $\frac{1}{2}m{v}^2$

Thus Kinetic energy is directly proportional to mass and velocity. Since mass is directly proportional to K.E and K.E is directly proportional to the square of velocity the kinetic energy becomes eight times.