Robin is swinging back and forth from a trapeze.

In which of the following situations is his kinetic energy being transformed into potential energy?
A.
when his speed is increasing and his height is decreasing
B.
when his height is not changing and his speed is zero
C.
when his height is increasing and his speed is decreasing
D.
when his height and speed are both equal to zero

Question

Robin is swinging back and forth from a trapeze.

In which of the following situations is his kinetic energy being transformed into potential energy?
 A. 
when his speed is increasing and his height is decreasing
 B. 
when his height is not changing and his speed is zero
 C. 
when his height is increasing and his speed is decreasing
 D. 
when his height and speed are both equal to zero

Vocaloid · Answer

Thoughts?

as a reminder, kinetic energy (KE) is proportional to v^2 (velocity squared) and potential energy (PE) is proportional to h (height)

if KE is being transformed into PE, that means KE is decreasing and PE is increasing. based on the above information, what does that say about the height and speed?