Question

A concrete block of mass 25kg is placed on a wooden plank inclined at an angle of 32° to the horizontal.calculate the force parallel to the inclined plane that will keep the block at rest of the coefficient of friction between the block and the plank is 0.45

Answer 1

25 kg * g * cos(32º) * .45 = ? Newtons

use 9.8 m/s^2 for g