Question

A block of mass 4kg is on the point of slipping down a plane inclined at an angle of 30° to the horizontal.What force parallel to the plane will just move it up the plane?

Answer 1

Solution

Inclined angle

$\theta=30°$

Mass m=4Kg

force parallel to the plane will just move it up the plane is given by

F=mg sin $\theta$

$=4\times9.81\times sin30°\\=19.62N$