100 points This child is in motion jumping on a trampoline. There are four forces that apply to this situation. Which are they?

Applied force
Normal force
Tension force
Friction force
Spring force
Air-Resistance force
Electrical force
Magnetic force
Gravitational force

Normal Force, Applied force, Gravitational Force, Spring Force

Explanation:

Normal Force so that he does not fall into trampoline, spring because the trampoline spring down when the force goes down, then up putting force upwards, gravitation because of gravity, and applied because of jumping

answer; /// i believe that the correct answer is (c)

wavelength divides in half and speed stays the same.