Sarthaks Test
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A three-wheeler starts from rest, accelerates uniformly with 1 m s–2 on a straight road for 10 s, 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?

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Straight line

Distance covered by a body in nth second is given by the relation

This relation shows that:

Dn ∝ n … (iii)

Now, substituting different values of n in equation (iii), we get the following table:

Since the given three-wheeler acquires uniform velocity after 10 s, the line will be parallel to the time-axis after n = 10 s.

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