Question

Jellyfish sometimes squeeze the sides of their bodies. This pushes a stream of water from the back end of their bodies. According to Newton's third law of motion, how will this behavior affect the movement of the jellyfish?
A. The jellyfish will move forward.
B. The inertia of the jellyfish will increase.
C. The jellyfish will move backward.
D. The jellyfish will stay still.
Is the answer A?
Thank you

Answer 1

Yes, for every action there is an equal and opposite reaction. Water goes one way, jelly fish goes the other.
Same way jet airplanes fly except they don't use water but the blast of hot gases from the engines.

Answer 2

Thank you