Brain Teaser

A hunter holds a rifle horizontally 6 feet above the ground. At the moment he fires it, another bullet is dropped from the same height, 6 feet. Ignoring frictional effects and the curvature of the earth, which bullet hits the ground first? Answer: Both bullets hit the ground at the same time. The force of gravity determines the rate at which the moving bullet falls. This force is vertical and entirely independent of the horizontal velocity of the projectile. Its vertical descent is the same regardless of any horizontal velocity it may have.