As a punishment for being late to a practice session the coach orders her star athlete to run up the stadium steps.The player's mass is 80 kg and it takes one minute for her to run up the 120 steps at a constant rate.If each step is of height 0.5 m,what is the power output of the player?
A)80.0 W
B)13.0 W
C)1570 W
D)785 W
E)390 W

Question

Quizplus · Accepted Answer

The power output is calculated using the formula: Power = Work/Time. The work done is equal to the gravitational potential energy gained, which is mgh, where m = 80 kg, g = 9.8 m/s², and h = 120 steps * 0.5 m/step = 60 m. So, Work = 80 * 9.8 * 60 = 47040 J. Time = 60 seconds. Power = 47040 J / 60 s = 784 W, which is approximately 785 W.

As a Punishment for Being Late to a Practice Session