A bow is drawn so that it has 40 J of potential energy. When the arrow is fired its kinetic energy is ideally
A) less than 40 J.
B) more than 40 J.
C) 40 J.
Question 2
A 2-kg mass that weighs 20 N has 40 J of potential energy relative to the ground. What is its height?
A) 1 m
B) 2 m
C) 3 m
D) 4 m
E) none of the above