[Homework Home > Gravity] |
[1] | Two people are sitting a distance r= m apart. One person has a mass m_{1}= kg . The other person has a mass m_{2}= kg . What is the force of gravitational attraction between the two people? |
[2] | You land on a mysterious new planet, and find that it has a mass of M= kg and a radius of R= m . What acceleration due to this planet's gravity do you feel on the surface of the planet? |
[3] | You are the CEO of a hot new telecommunications company and need to put a satellite in orbit above the Earth. The satellite has a mass of m= kg , and you need an orbit a distance h= m above the Earth. How fast does the satellite need to be moving to stay in orbit (e.g. what is v in the figure)? |
[4] | The acceleration due to gravity at the Earth's surface is 9.8 m/s^{2}. What is the acceleration due to gravity at a distance h= m above the surface of the Earth? |
[5] | Looking through your telescope, you discover a new planet with a moon orbiting around it, much like our Moon orbits around the Earth. You figure out that this new moon orbits around its planet once every t= hours , with an orbital radius of r= meters . What is the mass of this new planet? |