During a workout two football players run up the stadium sta

During a workout, two football players run up the stadium stairs in 75 seconds. The stairs are 78 meters long at an incline of 33 degrees. Ignore friction and air resistance. Player A has a mass of 90 and player B has a mass of 120 kg. What is the work done by each player? What is the power exerted by each player?

Solution

Player A

Work done = mgh = 90*9.8*78*sin33 degree = 37469 J

Player B

Work done = mgh = 120*9.8*78*sin 33 degree =49958.667 J

b.

Pwer by player A = work one /time = 37469/75 =499.6 W

Pwer by player B = work one /time = 49958.667/75 =666.11 W