Exam 6: Gravity, Projectiles, and Satellites

A hollow spherical planet is inhabited by people who live inside it, where the gravitational field is zero. When a very massive space ship lands on the planet's surface, inhabitants find that the Gravitational field inside the planet is

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

Pioneer 10 was able to escape the solar system by

An airplane flies at 40 m/s at an altitude of 50 meters. The pilot drops a heavy package which falls to the ground. Where, approximately, does the package land relative to the plane's new position?

What is the force of gravity on a 500-newton woman standing on the Earth's surface?

An Earth satellite is simply a projectile

Acceleration is greater for a satellite when it is at the

If the radius of the Earth somehow decreased with no change in mass, your weight would

A projectile is fired vertically from the surface of the Earth at 8 km/s. The projectile will

If the mass of the Earth somehow increased with no change in radius, your weight would

A supplier wants to make a profit by buying metal by weight at one altitude and selling it at the same price per pound at another altitude. The supplier should

What prevents satellites such as a space shuttle from falling?

If you drop a stone into a hole drilled all the way to the other side of the Earth (neglect the molten core), the stone will

When you step on a weighing scale at noon, the Earth pulls you down and the overhead sun pulls you upward. The reason the sun's pull doesn't decrease your weight at noon is because

If the sun collapsed to a black hole, the Earth's gravitational attraction to it would be

Consider two planets in space that gravitationally attract each other. If the masses of both planets are doubled, and the distance between them is also doubled, then the force between them is

A long perfectly level, frictionless bowling alley, over 2000 meters long, is built by a group of students as a class project. The center just touches the earth near their school and the ends of the Alley extend into outer space. A bowling ball released at one of the ends, starts rolling towards the center of the alley and will continue moving

A weight watcher who normally weighs 400 N stands on top of a very tall ladder so she is one Earth radius above the Earth's surface. How much would she weigh there?

If a block is set sliding on a huge frictionless plane in contact with the Earth, it will NOT continue to move at constant speed because

A projectile is fired horizontally in a region of no air resistance. The projectile maintains its horizontal component of velocity because