Exam 4: Gravity, Projectiles, and Satellites

The speeds of the planets about the Sun depend on

A bullet fired horizontally hits the ground in 0.5 s. If it had been fired with twice the velocity it would have hit the ground in

Compared with the period of satellites in orbit close to Earth, the period of satellites in orbit far from Earth is

A bullet fired from a rifle begins to fall

A projectile is launched straight upward at 50 m/s. If air resistance is negligible, its speed upon returning to its starting point is

If Earth's mass doubled with no change in radius, your weight would

A ball player wishes to determine pitching speed by throwing a ball horizontally from an elevation of 5 m above the ground. The player sees the ball land 20 m down range. What is the player's pitching speed?

A stone is thrown horizontally from the top of a cliff. One second after leaving your hand it drops a vertical distance of

Traveling from Earth to the Moon requires that a rocket have

Dwarf planet Pluto was discovered by perturbations of

A lunar month is about 28 days. If the Moon were farther from Earth than it is now, the lunar month would be

A projectile is fired horizontally. With no air resistance it maintains its horizontal component of velocity because

Roll a bowling ball off the edge of a table. As it falls, its horizontal component of motion

Minimal orbit speed about Earth is about 8 km/s. Minimal orbital speed about Jupiter would be