Physics Math

Question

For a huge luxury liner to move with constant velocity, its engines need to supply a forward thrust of 7.50 X 10^5 N. What is the magnitude of the resisting force exerted by the water (in N) on the cruise ship?

Answer 1

If the ship is moving at a constant velocity, then the resistive force must balance the forward thrust, so it must be 7.50 x 10⁵ N, in the opposite direction to the motion of the ship.