Definitely D. The brakes on a bike rub against the wheel. Not sure about the others.
Explanation:
PRIMERO ENCUENTRAS EL PESO DEL PARACAIDISTA
= 65 kg(
) = 637 N
CON LA FÓRMULA DE LA ENERGÍA POTENCIAL
U = 637 N(6000 m - 3500 m) = 1592500 J
Using K.E=1/2MV^2
answer is 125joules