Question

Alexander has a mass of 70 kilograms. his apartment is on the second floor. 5 meters yo from ground level . How much work does he do against gravity each time he climbs the stairs to his apartment.

Answer 1

potential energy gain = work done by alexander

PE=mass*gravity * height

PE=70kg*9.81*5=3433.5

take g=9.81

answer =3433.5