https://phet.colorado.edu/sims/html/gravity-and-orbits/latest/gravity-and-orbits_en.html

5. Escape velocity. Set up a satellite on earth and then use the cursor to increase its tangential velocity incrementally until it escapes the central mass without making a full revolution. Record the minimum velocity at which this occurs. Measure and record the Period using the simulation. 6.0 Kepler's law Verification Select the Sun and the Earth and the "To Scale\" Simulation. a. Shift the earth's radius of orbit slightly away from the sun and use the tape to measure and record the distance from the sun's center. You should also change its mass slightly to obtain a nearcircular orbit. Record the \"new\" mass of the earth as Planet 1. Record the period of this obit as T1. b. Change the radius of the orbit of the earth more substantially (but to within one twice the original radius of the orbit.) Use your tape to measure the new radius of orbit from the center of the sun. You should also change its mass slightly to obtain a nearcircular orbit. Record this \"new\" mass and record it as Planet 2. Record the period of this obit as T2. Radius of Period T;1 Orbit R2 of of Planet-2 Planet- 2 ls Kepler's Third law obeyed? Explain. Calculate the value of the Constant, (4 2') for your system. M5 is the mass of the sun. TI."