Quiz4U! Find the magnitude of the normal force:

Question

A concrete slab lies on a ramp tilted 50 degrees. The slab has a mass of 11.224 kg. Find the magnitude of the normal force.

Possible Answers:

66.50N

70.70N

88.77N

93.31N

97.72N

Answer 1

Let:

N be the normal force,

g = 9.8 m/s^2 be the acceleration due to gravity.

Resolving perpendicular to the slope:

11.224g cos(50) = N

N = 11.224 * 9.8 cos(50)

= 70.70 N.