An electric train move from rest with a uniform acceleration of 1.5 m per second square for the first 10 seconds and then continue accelerating at 0.5 m per second square for a further 20 seconds continue at a constant speed and finally take 30 seconds to decelerate uniformly . (a) draw a graph of Speed against time for the drawing
(b) from your graph or otherwise did use the total distance traveled
(c) what is the average speed of the train for the whole average ​