Exam 4: Gravity, Projectiles, and Satellites

The Earth and the Moon gravitationally attract each other.Does the more massive Earth attract the Moon with a greater force,the same force,or less force than the Moon attracts the Earth? What reasoning guides your answer?

When the distance between a pair of stars decreases by half,the force between them

Pioneer 10 was able to escape the solar system by

Why does a satellite in elliptical orbit gain speed as it moves closer to the planet? When is its kinetic energy greatest? Least? Where is its potential energy greatest? The least?

Consider a monkey wrench released at rest at the far edge of the solar system that drops to Earth by virtue of only Earth's gravity.The wrench will strike Earth's surface with a speed of about

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

The tangential velocity of an Earth satellite is its velocity

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

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

Two objects move toward each other due to gravity.As the objects get closer and closer,the acceleration of each

A bullet fired from a rifle begins to fall

What is the magnitude and direction of the gravitational force that acts on a person who weighs 500 N at Earth's surface?

The Earlybird communication satellite hovers over the same point on Earth's equator indefinitely because

When the distance between a pair of stars doubles,the force between them

A ball rolls off the edge of a table at the same time another ball drops vertically from the same table.The ball to hit the floor first is the

If the Earth had twice its present radius and twice its present mass,what change in weight would you experience? Explain.

The period of a satellite,the time it takes for a complete revolution,depends on the satellite's

Nellie tosses a ball upward at an angle.Assuming no air resistance,which component of velocity changes with time?

This chapter states a link between Newton's Universal Law of Gravity and

Inside a freely-falling elevator your