A straw is used for a pea shooter. When you blow through the straw the speed of the emerging pea will be greater if the straw is

A heavy rock and a light rock in free fall have the same acceleration because the

If there were no gravity, a cannonball fired upward at 45° would follow a straight-line path. Due to gravity, however, at the end of 3 s it is

An important condition for the operation of the Falkirk Wheel is that

The attraction of Earth on a skydiver pulls the diver downward. The reaction to this force is

Air resistance on a high-speed projectile shortens its

An ice cube that contains small pieces of iron floats on water. When the ice melts, the water level

While driving down the highway a lovebug spatters onto your windshield. Which undergoes the greater change in momentum during the time of contact?

The hang time of an athlete who moves horizontally 2.0 m during a 1.25-m-high jump is

A boat loaded with wood floats in a swimming pool. When the wood is thrown overboard, the pool level