Question

A block of wood of mass 3kg is resting on the surface of a rough inclined surface, inclined at an angle 30 as shown in the figure:a) name the forces(1,2,3),b)if the coefficient of static friction is 0.2,calculate the value of all the three forces

Answer 1

Assuming the surface is flat, having no inclination.

Minimum Force (F) required to move the block= ¥N in horizontal direction

Where, ¥ is coffecient of friction

N is normal force which is equal to mg in this case, here m is mass of body and g is value of acceleration due to gravity.

So, F = ¥N = ¥mg = 0.2 × 3 × 9.8 = 5.88 Newton