A car is driving on a level highway. It is acted upon by the following forces: a downward gravitational force of 12 kN, an upward contact force due to the road of 12 kN, another contact force due to the road of 7 kN directed West, and a drag force due to air resistance of 5 kN directed East. What is the net force acting on the car?
A) 7 kN East
B) 24 kN up
C) 2 kN West
D) 5 kN East
E) 2 kN East

Question

Quizplus · Accepted Answer

The vertical forces cancel each other out (12 kN down and 12 kN up). Horizontally, the net force is 7 kN West minus 5 kN East, resulting in 2 kN West.

A Car Is Driving on a Level Highway