Velocity-time graph for the motion of an object in a straight path is a straight line parallel to the time axis. Find the acceleration of the body.
If the velocity-time graph of an object is a straight line parallel to the time axis. It means there is no change in velocity.
Therefore, $acceleration=\frac{change\ in\ velocity}{time}$
$=\frac{0}{time}$
$=0$
Therefore, the acceleration of the object is zero when the velocity-time graph of an object is a straight line parallel to the time axis.
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