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? *

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  =  

  Work done  = mgh

 m is the mass

 g is the acceleration due to gravity

 h is the height

     Power  =   = 753.9Watts

its a 5.5 n

glad that

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19