(b) Figure 2 shows the direction of the thrust exerted by the ship's propeller as the propeller rotates. The ship's engine makes the propeller rotate. When more water is accelerated, more work is done by the engine.
Figure 2
surface of water
direction of
thrust on water
propeller
hull of ship
Explain, using Newton's laws of motion, how the thrust of the propeller on the water enables the ship to maintain a constant momentum.