What kind of forces do you think exist in a jet pack?

The JB-9 carries 4.5 kilograms (10 lb) of kerosene fuel that burns through two vectored thrust AMT Nike jet engines at a rate of 3.8 litres (1 US gallon) per minute for up to ten minutes of flying time, depending on pilot weight.

Explanation:

The forces of gravity

Explanation:

Newton's third law states that for every action, there is an equal and opposite reaction. In this case, the jetpack is ejecting water at high velocity toward the ground. This is generating a significant force downward. The resulting opposite force pushes upward, elevating the rider.

c)as speed changes, wavelength and frequency change.

everything changes!