Answer: 4000 W
Explanation:
Power output is equal to the amount of work done per unit time.
Work done = Force × displacement
Here, work done = (mg) h ( gravitational potential energy)
W = (1000 N)(2.0 m) = 2000 J
Thus, power output = W/t = (2000 J) ÷ (0.5 s) =4000 J/s = 4000 W
When a power-lifter raises a 1000 N weight a distance of 2.0 m in 0.5 s, his power output is 4000 W.
