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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

A boy walks a distance 30 m in 1 minute and another 30 m in 1.5 minute. Describe the type of motion of the boy and find his average speed in m s-1. - Physics

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प्रश्न

A boy walks a distance 30 m in 1 minute and another 30 m in 1.5 minute. Describe the type of motion of the boy and find his average speed in m s-1.

बेरीज

उत्तर

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

= `2.5xx 60  _ s =150  _s`

Average speed = `"Total distance travelled "/" Total time of travel"`

= `(60"m")/(150"s")= 0.4  "m s"^-1`

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पाठ 2: Motion - Numericals

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