To determine the mass of a car, a student (with a friend at the wheel) pushes the car holding a bathroom scale between himself and the car and carefully maintains a constant reading of 400 N on the scale while the car accelerates on level ground. At the conclusion of the experiment his friend reports that the car accelerated from rest to 14.0 km/hr in 12.0 s.
What was the mass of the car?
First we must find the acceleration of the car:
v = v0 +at
Where v is teh final speed, v0 is teh initial speed (in this case v0=0), a is the acceleration and t is the ...
With full calculations and explanations, the problem is solved.