Question

a st wants to know the effect of mass on ke. he will drop 2 balls of the same size in a pool. which investigation fits? drop 2 balls of the same mass from the same height drop 2 balls with different masses from the same height drop 2 balls with different masses from different heights drop 2 balls of the same mass from different heights

Explanation:

The student wants to study the effect of mass on kinetic energy (KE). According to the KE formula $KE=\frac{1}{2}mv^{2}$, to isolate the variable of mass, other factors like height (which affects velocity when dropped) should be kept constant. So, different - mass balls should be dropped from the same height.

Answer:

drop 2 balls with different masses from the same height