How much work would it take to push a 2 kg  weight up a  7 m  plane that is at an incline of  pi / 12 ?

May 7, 2016

$35.5 J$

Explanation:

Work done $W = m g l \sin \theta$
where $\text{mass} \left(m\right) = 2 k g$
$\text{length of the plane} \left(l\right) = 7 m$
$\text{Angle of inclination of the plane} \left(\theta\right) = \frac{\pi}{12}$
$\text{Acceleration due to gravity(g)} = 9.8 \frac{m}{s} ^ 2$

$\text{Work done(W)} = 2 \times 9.8 \times 7 \times \sin \left(\frac{\pi}{12}\right) = 35.5 J$