Answer to Question #291843 in Mechanics | Relativity for bookaddict

Question

what is the work done by gravity when a wooden block of mass 2 kg slides 3 m down a slope inclined at 30 degrees?

Answer 1

Solution

Mass of wooden block m=2Kg

Angle $\theta=30°$

Vertical height h=$3sin30°=1.5m$

So work done by gravity

W=mgh

$=2\times9.81\times1.5\\=29.43J$