Understanding Gravitational Potential Energy and Escape Velocity

What happens to the work required to move an object away from Earth as the distance increases?

• It increases.

• It remains constant.

• It decreases.

• It becomes zero.

What is the general expression for gravitational potential energy?

• U = MGH

• U = G * M * m / R

• U = -G * M * m / R

• U = 1/2 * M * V^2

What is the escape velocity for Earth?

• 11.2 km/h

• 11.2 km/s

• 112 km/h

• 112 km/s

How fast would you need to travel to escape the Martian moon Deimos?

• 200 km/s

• 200 km/h

• 20 km/s

• 20 km/h

What is the escape velocity of a neutron star compared to Earth?

• About 10,000 times that of Earth

• About 1,000 times that of Earth

• About 100 times that of Earth

• About 10 times that of Earth