A person weighing 50kg climbs the stairs with a height difference of 5 meters within 4 seconds what is work done by that person
Answers
Answer:
Given,
mass of boy = m = 50 kg
height = h = 100m
since boy does not move anything with his force, work done by him is zero
work done on the boy = gain in potential energy
P.E=mgh
P.E=50×9.8×100
P.E=49KJ
so, potential energy gained by boy is 49 KJ
Explanation:
pls mark me as BRAINLIST❤
Given,
Mass of a person = 50 Kg
Height of the staircase = 5 meters
Time taken to reach upstairs = 4 seconds
To find,
Total work done by the person.
Solution,
We can simply solve this numerical problem by using the following process:
Mathematically,
Potential energy= Mass of the object doing the work (m) x acceleration due to gravity (g) x final height or elevation (h){Equation-1}
Now, according to the equation-1;
Total work done by the person in reaching the upstairs
= total amount of potential energy acquired
= mass of the person (m) x acceleration due to gravity on earth (g) x height of the staircase (h)
= 50 Kg × 9.8 m/s^2 × 5 meters
= 2450 Kg.m^2/s^2 = 2450 J
Hence, the total work done by the person in reaching the upstairs is equal to 2450 J.