Exam 6: Gravity, Projectiles, and Satellites

The ground speed of an airplane that has an airspeed of 200 km/h when it is in a 200-km/h crosswind is

The radial velocity of an Earth satellite is its velocity

Inside a freely-falling elevator, there would be no

A hunter on level ground fires a bullet at an angle of 2 degrees below the horizontal while simultaneously dropping another bullet from the level of the rifle. Which bullet will hit the ground first?

Minimal orbital speed about the Earth is about 8 km/s. Minimal orbital speed about the moon would be

The fastest moving planet in a solar system is

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

A "weightless" astronaut in an orbiting shuttle is

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

A rock is thrown upward at 50 degrees with respect to the horizontal. As it rises, its vertical component of velocity.

The force of gravity acts on all apples on an apple tree. Some apples are twice as far from the ground as others. These twice-as-high apples, for the same mass, have

Each of us weighs a tiny bit less inside the ground floor of a skyscraper than we do on the ground away from the skyscraper. The reason for this is the

Passengers in a high-flying jumbo jet feel their normal weight in flight, while passengers in the orbiting space shuttle do not. This is because passengers in the space shuttle are

The speeds of the planets about the sun depend on

A satellite in an elliptical orbit travels at constant

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?

If a moon orbits one of our most distant planets in an elliptical path. The distance that the moon covers each day is

A satellite near the Earth makes a full circle in about an hour and a half. How long would a satellite located as far away as the moon take to orbit the Earth?

A projectile is launched at ground level an angle of 15 degrees above the horizontal and lands down range. What other projection angle for the same speed would produce the same down-range distance?

The force of gravity does work on a satellite when it is in