Question

In a physics lab, a 60-kg student runs up a 2.0-meter tall flight of stairs in 1.5 seconds. The student's power rating is approximately a. 20 b. 45 c. 80 d. 180 e. 200 f. 450 g. 800 h. 1800 w.

Answer 1

Answer:

g. 800

Explanation:

Mass = 60-kg

Distance = 2m

Time = 1.5s

Using g = 10m/s^2

power rating = Work/time

Work = force × distance

        = Mass × acceleration due to gravity × distance

        =  60 × 10 × 2

        = 1200 J

Power rating = 1200/1.5

                     = 800 J/s = 800Watts