# How much work does it take to raise a 14 kg  weight 2 m ?

It takes $- 274.68 J$.
You have to use the equation $L = - \left(U \left(B\right) - U \left(A\right)\right)$, where $U = m g h$.
$L = 0 - m g h = - \left(14 k g \cdot 9.81 \frac{m}{s} ^ 2 \cdot 2 m\right) = - 274.68 J$.