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

Dec 10, 2015

I found: $1441 J$

#### Explanation:

Your work will be given as:
$W = m g h$
where
$h = 21 m$
$m = 7 k g$
So:
$W = 7 \cdot 21 \cdot 9.8 = 1440.6 \approx 1441 J$
Work done against gravity.