What is the ratio of potential energy to kinetic energy for a ...

[aabwk4]

What is the ratio of potential energy to kinetic energy for a comet that has just enough energy to escape from the Sun's gravitational field?
 
  A) 1/2
  B) 1
  C) 2
  D) -1
  E) -2

Question 2

A new roller coaster contains a loop-the-loop in which the car and rider are completely upside down.
 
  If the radius of the loop is 13.2 m, with what minimum speed must the car traverse the loop so that the rider does not fall out while upside down at the top? Assume the rider is not strapped to the car.
  A) 11.4 m/s
  B) 12.5 m/s
  C) 10.1 m/s
  D) 14.9 m/s

[raenoj]

Answer to Question 1

D

Answer to Question 2

A

[aabwk4]

Both answers were spot on, thank you once again

[raenoj]

Great! Please up vote