Test Questions

1. Two masses, 2000 kg and 500 kg, are 10 m apart. Calculate the gravitational force between them.
2. A satellite orbits Earth at 400 km altitude. Determine its orbital speed and period.
3. Calculate escape velocity from Earth and the Moon.
4. Find the gravitational potential energy of a 600 kg satellite at 300 km above Earth.
5. Using Kepler’s Third Law, find the orbital radius of a satellite with a period of 12 hours.
6. Compute centripetal acceleration of a satellite at 800 km above Earth.
7. Determine the speed required for a rocket to escape Mars’ gravity.
8. Compare the gravitational force on satellites in low Earth orbit and medium Earth orbit.
9. A 500 kg satellite moves in a circular orbit of radius 7000 km. Find the centripetal force.
10. Explain why a geostationary satellite must have an orbital period of 24 h and orbit above the equator.