A boy walks a distance 30 m in 1 minute and another 30 m in 1.5 minutes. Describe the type of motion of the boy and find his average speed in m/s.
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Explanation:
As the speed does not remain constant throughout the journey the motion is non-uniform.
Total distance travelled in going and coming back,
d=30m+30m=60m
Total time taken in going and coming back
t=1min+1.5min=2.5min
=2.5×60s=150s
Average speed =
Total time of travel
Total distance travelled
=
150s
60m
=0.4ms
−1
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