Question

The luxury liner Queen Elizabeth 2 has a diesel-electric powerplant with a maximum power of 90 MW at a cruising speed of 31.5 knots. What forward force is exerted on the ship at this highest attainable speed? (1 knot = 0.514 m/s. MW = Megawatts)

Answer 1

5558643.69 N

Step-by-step explanation:

F = Force

v = Velocity = 31.5 knots

Converting to m/s

`1\ knot=0.514\ m/s`

`31.5\ knot=31.5* 0.514\ m/s=16.191\ m/s`

Power is given by

`P=Fv\\\Rightarrow F=(P)/(v)\\\Rightarrow F=(90* 10^6)/(16.191)\\\Rightarrow F=5558643.69\ N`

The forward force is exerted on the ship at this highest attainable speed is 5558643.69 N