A student with a mass of 75 kg runs up a 4 meter flight of stairs in 3.9 s. What is the power exerted by the student? *

Respuesta :

Answer:

753.9Watts

Explanation:

Given parameters:

Mass of the student = 75kg

Height  = 4m

Time  = 4.9s

Unknown:

Power exerted by the student  = ?

Solution:

To solve this problem, we must know that power is the rate at which work is done.

  Power  = [tex]\frac{work done}{time}[/tex]  

  Work done  = mgh

 m is the mass

 g is the acceleration due to gravity

 h is the height

     Power  = [tex]\frac{75 x 9.8 x 4}{3.9}[/tex]   = 753.9Watts