Work-Energy Balance & Conservation of Energy - Conceptual Example 7.6-1

 

Two metal balls have the same size but one weighs twice as much as the other. The balls are dropped from the roof of a single story building at the same instant of time.

 

Assuming no air resistance, identify which of the following are true.

 

The lighter ball will reach the ground with more kinetic energy.
The heavier ball will reach the ground with more kinetic energy.
Both balls will reach the ground with the same amount of kinetic energy.
The lighter ball will reach the ground first.
The heavier ball will reach the ground first.
Both balls will reach the ground at the same time.