10.2 Review #2

Which one has more total energy while orbiting the planet?

• circular m (requires more initial energy to reach that height)

• rectangular m (requires more initial energy to reach that height)

Which one has more KINETIC energy while orbiting the planet?

• circular m ((further from planet, requires more speed)

• rectangular m (closer to planet, requires more speed)

Which one has more GRAVITATIONAL POTENTIAL energy while orbiting the planet?

Ep = -GMm/r

• circular m (has a small and negative magnitude of Ep)

• rectangular m (has larger and negative magnitude of Ep)

If the circular m wants to be orbiting in rectangular m. In order to change the orbital path, it uses special rocket engines for propulsion.

• Work done by rockets is a negative value (to increase the -Ep)

• Work done by rockets is a positive value (to decrease the -Ep)

If the circular m wants to be orbiting in rectangular m. In order to change the orbital path, it uses special rocket engines for propulsion.

• Kinetic Energy would increase to be orbiting close to Earth

• Kinetic Energy would decrease to be orbiting close to Earth