Two objects, one of mass m and the other of mas $2 m$ are dropped from the top of a building. If there is no air resistance, when they hit the ground
A) the heavier one will have half the kinetic energy of the lighter one.
B) both will have the same kinetic energy.
C) the heavier one will have twice the kinetic energy of the lighter one.
D) the heavier one will have one-fourth the kinetic energy of the lighter one.
E) the heavier one will have four times the kinetic energy of the lighter one.

Question

Quizplus · Accepted Answer

The kinetic energy of an object is given by $ KE = \frac{1}{2}mv^2 $. Since both objects fall from the same height, they have the same velocity upon hitting the ground. The heavier object has twice the mass, so it will have twice the kinetic energy.

Two Objects, One of Mass M and the Other of Mas