question_answer

  Distance travelled by a train and time taken by it is shown in the following table. (i) Plot distance-time graph, (ii) What is the average speed of the train? (iii) When is the train travelling at the highest speed? At what distance does the train slow down? (v) Calculate the speed of the train between 10:40 AM to 11:00 AM.

Time	Distance (in km)
10:00 AM 10:30 AM 10:40 AM 11:00 AM 11:15 AM 11:30 AM	0 25 28 40 42 50

Answer:

                  We know the upward motion, orBut at highest point v = 0 Therefore,  For first ball, and for second ball,                                                (1) Thus,    or