Compute the power output (watts)during one minute of treadmill exercise,given the following: Treadmill grade = 10%
Horizontal speed = 100 meters per minute
Subject's body weight = 60 kg (i.e. ,force = 588.6 Newtons)
1 joule = 1 newton-meter
1 watt = 1 joule per second
1 kcal = 426.8 kpm
A)98.1 watts
B)981 watts
C)9810 watts
D)Power output cannot be calculated given the information above.

Question

Quizplus · Accepted Answer

The power output can be calculated using the formula for work (force x distance) and the conversion to power (work/time). The vertical speed (rise) is 10% of the horizontal speed, so it's 10 meters per minute (100 meters * 10%). The force exerted vertically is equal to the subject's weight (588.6 N). The work done per minute is 588.6 N * 10 m = 5886 joules. Since power is work/time and there are 60 seconds in a minute, the power output is 5886 joules/60 seconds = 98.1 watts.

Compute the Power Output (Watts)during One Minute of Treadmill Exercise,given