Homework Help: physics

Posted by Ahmad Alotaibi on Tuesday, November 20, 2012 at 3:04pm.

Jessie exerted a force of 400N to move a box across the floor to a distance of5m in 4sec. What is his power is kilowatts? Megawatts? Horsepower?

physics - Damon, Tuesday, November 20, 2012 at 3:49pm
power = work energy/time
= 400 * 5 / 4 = 500 watts
= .5 Kw
= .5*10^-3 = 5 * 10^-4 Megawatts

.5 kw * 1.34 hp/kw = .67 hp

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