# How much work does it take to raise a 14 kg  weight 15 m ?

The elapsed work is $- 2060.1 J$
Consider the equation $L = - \left(U \left(B\right) - U \left(A\right)\right)$ where $U = m g h$.
You use your values and find that $L = - m g h + 0 = 14 k g \cdot 9.81 \frac{m}{s} ^ 2 \cdot 15 m = - 2060.1 J$