You are testing a new amusement park roller coaster with an empty car of mass 120 kg. One part of the track is a vertical loop with radius 12.0 m. At the bottom of the loop (point A) the car has speed and at the top of the loop (point B) it has speed As the car rolls from point A to point B, how much work is done by friction

e) none of the above answers are correct

568.98

explanation:

its math

pe = weightxheight = 2000x1000=2,000,000joules

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.