Answer to Question #205506 in Physics for David festus

Question

A car start from rest and accelerate uniformly to a velocity of 20m/s in 20seconds. This velocity is then maintained for 30secs before the car discellerate to rest in 10secs. Sketch the graph of the motion and calculate the total distance travelled.

Answer 1

$$s=0.5(20)(20)+(20)(30)+0.5(20)(10)\\s=900\ m$$