Question

A 100N weight rest on a 30 degrees inclined plane. Neglecting friction, how much pull must one exert to bring the weight up the plane

Answer 1

$\text{Component of gravity acting along an inclined plane:}$

$F_g = mg\sin\alpha$

$\alpha= 30\degree$

$mg = 100N$

$F_{min} = F_g$

$F_{min} = 100\sin30\degree= 50N$

$\text{Answer:} 50N$