A car runs at a constant speed of 15m/s for 300sec and then accelerate uniformly to a speed of 25m/s over a period of 20sec. this speed is maintained for 300sec before the car is brought to rest with uniform deceleration in 30sec. Draw a velocity time graph to rep the journey described above. from the graph, find the
1. the acceleration when the velocity increases from 15m/s to 25m/s
2. the total distance traveled in the time described
3.the average speed over the time described