Question

A 2,493-kg car is moving down a road with a slope (grade) of 14% at a constant speed of 13 m/s. What is the direction and magnitude of the frictional force? (define positive in the forward direction, i.e., down the slope)?

Answer 1

I know how to convert the percentage to degrees already

Answer 2

how did u convert?

Answer 3

using the inverse of tangent

Answer 4

i hate conversions -_-

Answer 5

I know lol

Answer 6

You can immediately discern the direction of the friction as friction is defined to be against the motion in most cases. From there you can set up a drawing somewhat like this