Question

9. A 50 kg physics i student trudges from the 1st floor to the 3rd floor, going up a total height of 13 m.

Calculate the work done by the student

Answer 1

Answer:

6370 J

Explanation:

By the law of energy conservation, the work done by the student would be the change in potential enegy from 1st floor to 3rd floor, or a change of 13 m

$W = E_p = mgh$

where m = 50kg is the mass of the student, g = 9.8 m/s2 is the gravitational constant and h = 13 m is the height difference

$W = 50*9.8*13 = 6370 J$