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Q.
A car moves along a straight line according to the $x-t$ graph given alongside. The instantaneous velocity of the car at $t=t_{1}$ is
Motion in a Straight Line
Solution:
The instantaneous velocity is the slope of the tangent to the $x-t$ graph at that instant of time.
At $t=t_{1}$, the tangent is parallel to time axis as shown above and hence, its slope is zero. Thus, instantaneous velocity at $t=t_{1}$ is zero.
