Question

The kinetic energy of a body is increased most by doubling its:

• A. mass
• B. density
• C. weight
• D. speed

Answer 1

The correct option is D speed

Kinetic energy is given by $\frac{1}{2}m{v}^2$

Means k.E. is directly proportional to mass and directly proportional to square of velocity.

So velocity will have highest impact on kinetic energy.

Weight and density are linear variable of mass so both will have same effect as that of mass.

So best option is option D.