Question

How much work does it take to raise a `7 kg` weight `21 m`?

Answer 1

I found: `1441J`

Explanation:

Your work will be given as:
`W=mgh`
where
`h=21m`
`m=7kg`
So:
`W=7*21*9.8=1440.6~~1441J`
Work done against gravity.