A distance-time graph of a person walking shows distance $0$ km at $t=0$, $2$ km at $t=1$ h and $4$ km at…

A distance-time graph of a person walking shows distance $0$ km at $t=0$, $2$ km at $t=1$ h and $4$ km at $t=2$ h. The motion is best described as:
  1. Stationary
  2. Uniform speed of $2$ km/h
  3. Accelerating
  4. Decelerating

Solution

Equal distance ($2$ km) per hour gives a straight line with slope $2$, i.e. uniform speed of $2$ km/h.

Asked in: IMO

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