Question

You are working out on a rowing machine. Each time you pull the rowing bar (which simulates the oars) toward you, it moves a distance of 1.1 m in a time of 1.8 s. The readout on the display indicates that the average power you are producing is 90 W. What is the magnitude of the force that you exert on the handle?

Answer 1

147.27N

Step-by-step explanation:

Power = workdone/time

Power = Force*distance/time

Given

Power = 90Watts

Distance = 1.1m

Time = 1.8secs

Force = ?

Substitute the given parameters into the formula:

`90 = (1.1d)/(1.8)\\cross \ multiply\\ 90 * 1.8 = 1.1F\\162 = 1.1F\\1.1F = 162\\F = (162)/(1.1) \\F = 147.27N`

Hence the magnitude of the force that you exert on the handle is 147.27N