A speed boat requires 85.0 kW to move at a constant speed of 14.0 m/s.What is the resistive force of the water at this speed?
A)1 190 N
B)6 070 N
C)6 170 N
D)5 970 N
E)1 290 N

Question

Quizplus · Accepted Answer

The resistive force of the water can be calculated using the formula for power: $P = F \cdot v$, where $P$ is the power in watts (85.0 kW or 85000 W), $F$ is the force in newtons, and $v$ is the velocity in meters per second (14.0 m/s). Rearranging the formula to solve for $F$ gives $F = \frac{P}{v}$. Substituting the given values, $F = \frac{85000}{14} = 6071.43 \, \text{N}$, which rounds to 6070 N, making option B the correct answer.

A Speed Boat Requires 85