A car decelerates uniformly from 20 m s' to
zero in a time interval of 2.0 s. What are its
acceleration and distance travelled during this
time interval?
Answer: accleration = - 10m/s² distance = 20 m Explanation: u = 20 m/s v = 0 time = 2 s acceleration = v-u/t a = 0 - 20/ 2 = -10 m/s² distance travelled average velocity = 20/2 = 10m/s distance travelled = av * t = 10 * 2 = 20 m
