Question

An engine moves a motorboat through water at a constant velocity of 22 meters/second. If the force exerted by the motor on the boat is 5.75 × 103 newtons, what is the power of the motor?


7.9 × 104 watts




1.3 × 105 watts




2.5 × 105 watts




3.7 × 105 watts




5.0 × 105 watts

Answer 1

Answer:

$1.3\cdot 10^5\,\,\,\mbox{Watts}$

Explanation:

(Power) = (Work) / (Time) = (Force) * (Displacement) / (Time) = (Force) / (Velocity)

$P = 5.75\cdot 10^3 N \cdot 2.2\cdot 10 \frac{m}{s} = 1.265\cdot 10^5 W$

The power is about 1.3e+05 Watts.

Answer 2

the other guy's right, the answer is B. 1.3 × 105 watts on plato :)