The variation of quantity A with quantity B, plotted in the figure , describes the motion of a particle in a straight line.

Options

A. Quantity B may represent time.
B. Quantity A is velocity if motion is uniform
C. Qunatity A is displacement if motion is unifrom
D. Quantity A is velocity if motion in unifromly

Answer

(a,c,d)

Explanation

Option (a) is correct as quantity B may represent time .
Here option (b) is wrong because for unifrom motion , v - t graph is simply a straight line parallel to the time axis (velocity remains constant in uniform motion). If the motion is uniform , displacement - time graph is a straight line with a positive slope.
Thus , option (c) can be correct. Also , if the motion in uniformly acceleration (acceleration is constant), this implies that velocity is increasing with time and hence , velocity - time gaph is a straight line with a positive also . Thus , optiion (d) is correct.
The correct options are (a), (c) and (d).