on
a straight road for 10 5, and then moves with uniform velocity. Plot the
distance covered by the vehicle during the nth second (n = 1, 2, 3...) versus
n. What do you expect this plot to be during accelerated motion: a straight
line or a parabola ?
Answer:
Distance travelled in nth second,
As 
Thus the distances travelled by
the three-wheeler at the end of each second are given by
Now, velocity of the three-wheeler
at the end of 10th s is given by
n(s)
1
2
3
4
5
6
7
8
9
10
0.5
1.5
2.5
3.5
4.5
5.5
6.5
7.5
8.5
9.5
Up to n = 10 s, the motion is
accelerated and the graph between 
and
n is a straight line AB inclined to time-axis as shown in Fig. 3.93. After 10th
second, the three-wheeler moves with uniform velocity of 
so graph is
straight line BC parallel to time-axis.
Fig. 3.93
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