Compute the total work and power output per minute for 10 minutes of

treadmill exercise, given the following:

treadmill grade = 15%
horizontal speed = 90 m/min-1
subject’s weight = 70kg 3.

Work = 92,704.5 joules

Power= 154.5 watts

Explanation:

Given that:

Time= 10 minutes

treadmill grade = 15% = 0.15

horizontal speed = 90 meters/min

subjects weight = 70 kg

To calculate the total work, we have;

work = force × distance

force = mass × acceleration

= 70 × 9.81

= 686.7N

Also, distance = speed × time × fractional treadmill grade

∴ distance = 90 meters/min × 10 min ×  0.15 (treadmill grade)

Total work can therefore be calculated as:

work = force × distance

work = 686.7N × (90 meters/min × 10 min × 0.15 (treadmill grade) )

Work = 92,704.5 N/m

Work = 92,704.5 joules

To calculate the power, we have;

Power = workdone/time

Power = 92,704.5 joules/600 seconds

Power = 154.5 joules/second

Power= 154.5 watts

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