On Earth a 100 kg person riding a 300-meter-high roller coaster has 300 kj of potential energy at the top of the roller coaster. The Moon has roughly 1/6 the gravity of Earth. How high would a roller coaster need to be on the Moon so that a 100 kg person had 300 kj of potential energy at the top of the roller coaster? A. 300 meters

B. 50 meters

C. 1,800 meters

D. 600 meters

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

the doppler effect is used by weather forecasters to measure 

moving clouds