Question

A 4000 kg truck is parked on a 15˚ slope. How big is the friction force on the truck? The coefficient of static friction between the tires and the road is 0.90.

Answer 1

The answer is 10000 N

Answer 2

First job is to determine the normal force, \(F_N\). Can you do that?

Answer 3

@ospreytriple yes, it is 39200 N

Answer 4

Sorry, that's not it. You must resolve \(F_g\) into its components perpendicular and parallel to the incline.The normal force is equal in magnitude and opposite in direction to \(F_{g,x'}\).