A motor boat with a 5 kW engine develops a thrust force of 100 N. What is the speed of the boat?

The speed of a motor boat can be expressed and calculated from the power formula:

N = F * V, where N is the power of the motor boat engine (N = 5 kW = 5 * 103 W), F is the thrust force developed by the engine (F = 100 N), V is the required speed of the motor boat.

V = N / F.

Let’s do the calculation:

V = 5 * 103/100 = 50 m / s.

Answer: The motor boat is moving at a speed of 50 m / s.