How many joules are expended by a 70 kg man climbing up 6m of stairway? How much work is done if the climbing takes place on the

Question

3 years ago

13

surface of the moon? (Assume that the acceleration due to gravity on the moon’s surface is 1.6 m/s2

1 answer:

GuDViN [60] · Answer 1 · 2021-12-01T11:41:15+03:00

Answer:

On the earth surface ,W= 4200 J

On the moon surface ,W= 672 J

Explanation:

Given that

mass of the man ,m = 70 kg

Height of the stairway ,h= 6 m

On the earth surface :

We know that acceleration due to gravity at earth ,g= 10 m/s²

The work done by man is given as

W= m g h

Now by putting the values in the above equation we get

W= 70 x 10 x 6 J

W=4200 J

On the moon surface :

The gravity on the moon ,g= 1.6 m/s²

The work done W

W= 70 x 1.6 x 6 J

W=672 J

On the earth surface ,W= 4200 J

On the moon surface ,W= 672 J