Question

19) A brick on an inclined plane with an angle of 30° to the horizontal has a mass of 3 kg. A horizontal force F with a magnitude of 50 N is applied to the brick, such that a component of that force pushes the brick up the plane. The coefficient of kinetic friction between the brick and the inclined plane is 0.15 М 30 30° a) Use Newton's 2nd law to determine the magnitude of the normal force on the block

Answer 1

here,

theta1 = theta2 = 30 degree

the horizontal force , F = 50 N

mass of brick , m = 3 kg

Using Newton's second law

the normal force , N = m * g * cos(theta1) + F * sin(theta2)

N = 3 * 9.81 * cos(30) + 50 * sin(30) N

N = 50.5 N

the magnitude of normal force is 50.5 N