Question

A worker wants to turn over a uniform 1.0x103N rectangular crate by pulling at 30°on one of its vertical sides. The floor is rough enough to prevent the crate from slipping. Calculate the pull that is needed to just start the crate to tip.

Answer 1

Gives

$F=1.0\times10^3N$

$\theta=30°$

$W=F.dr=Fdrcos\theta$

$W=1.0\times10^3\times2\times cos30$

$$W=1.0\times10^3\times2\times\frac{\sqrt3}{2}=1732J$$