Question

Two cannonballs are dropped from a second-floor physics lab at height h above the ground. Ball B has four times the mass of ball A. When the balls pass the bottom of a first-floor window at height above the ground, the relation between their kinetic energies, KA and KB, is:_______.A) KA- 4KB B) KA 2KB C) KA KB D) KB 4KA.

Answer 1

Formula of kinetic energy

$e = \frac{1}{2} m {v}^{2}$

Therefore Kinetic energy of ball B is 4 times more than ball A.

ans is KB=4KA