Question

A car traveling on a straight road at 15.0 meters
per second accelerates uniformly to a speed of
21.0 meters per second in 12.0 seconds. The
total distance traveled by the car in this
12.0-second time interval is
(1) 36.0 m (3) 216 m
(2) 180. m (4) 252 m

Answer 1

The accelerated speed is (21-15)/12=0.5 m/s2. The rule of calculating the movement with constant accelerated speed is s=v0t + 1/2*at2. So the distance is 216 m. So the answer is (3).