Answer to Question #11369 in Mechanics | Relativity for heba

Question

a train starting from rest picks up a speed of 20m/s in 200 seconds . it continues to move at the same speed for the next 500 seconds . it is then brought to rest next 100 seconds.
1. plot a speed time graph
2.calculate the rate of uniform acceleration.
3.calculate the distance covered by the train during retardation
4. calculate the average speed during retardation.