Question

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 Multiple Choice a. 981 watts b. 9,810 wattsc. 981 wattsd. Power output cannot be calculated given the information above.

Answer 1

Answer:

c. 981 watts

$P=981\ W$

Explanation:

Given:

• horizontal speed of treadmill, $v=100\ m.min^{-1}=\frac{5}{3} \ m.s^{-1}$

• weight carried, $w=588.6\ N$

• grade of the treadmill, $G\%=10\%$

Now the power can be given by:

$P=v.w$

$P=588.6\times\frac{5}{3}$ (where grade is the rise of the front edge per 100 m of the horizontal length)

$P=981\ W$