To Determine the Mass of a Car, a Student (With

Multiple Choice

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?

A) 343 kg
B) 1230 kg
C) 2460 kg
D) 3360 kg
E) 3430 kg