A 2.1*10^3 kg car starts from rest at the top of a driveway that is sloped at an angle of 20 with the horizontal. An average friction force of 4.0*10^3 N impedes the car's motion so that the car's speed at the bottom of the driveway is 3.8m/s. What is the magnitude of the net force acting on the car?
Solution attempt: Is it just the parallel force minus the friction force which is (according to the problem) 4.0*10^3 N? i know that would be the net force but I'm confused with the word "magnitude" i don't really fully understand that word.
Solution attempt: Is it just the parallel force minus the friction force which is (according to the problem) 4.0*10^3 N? i know that would be the net force but I'm confused with the word "magnitude" i don't really fully understand that word.