We will have the following:

So, the heat to add is 3611.52 Joules.
The height difference is found by

Then the change in potential energy is
Answer:
the energy required for the extension is 12.25 J
Explanation:
Given;
force constant of trampoline spring, k = 800 N/m
extension of trampoline spring, x = 17.5 cm = 0.175 m
The energy required for the extension is calculated as;
E = ¹/₂kx²
E = 0.5 x 800 x 0.175²
E = 12.25 J
Therefore, the energy required for the extension is 12.25 J
Answer:
C?
Explanation:
My best guess would be C as it's the only answer that gives a reason behind the statement.