# How much work would it take to push a 8 kg  weight up a  7 m  plane that is at an incline of  pi / 12 ?

If a body of mass 'm' slides down on an inclined plane of inclination '$\theta$' through a distance 'S', then work done by gravity is $W = \left(m g \sin \theta\right) S$.
$W = \left[8 k g \times 9.8 \frac{m}{s} ^ 2 \times \sin \left(\frac{\pi}{12}\right)\right] \times 7 m$
$\implies W = 142.039 \approx 142$ Joules.