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4. A boy walks a distance of 30 m in 1 minute andanother 30 m in 1-5 minute. Describe the type ofmotion of the boy and find his average speedin m s-1 |
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Answer» As the speed does not remain constant THROUGHOUT the journey the motion is non-uniform Total distance travelled in going and COMING back d = 30 m + 30 m = 60 m Total time taken in going and coming back t = 1 MIN + 1.5 min = 2.5 min = 2.5 × 60 s = 150 s Average speed = Total distance travelled/Total time of TRAVEL = 60 m/150s = 0.4 m s-1 |
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