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CBSE Class 9 Answered

An object moves 18 m in the first 3 seconds and 22 m in the next 3 seconds while it travels 14 m in the last 3 seconds. Calculate the average speed.  
Asked by Topperlearning User | 10 Jun, 2016, 11:00: AM
answered-by-expert Expert Answer

Given data: s1 = 18 m, t1 =3 s, s2 = 22 m, t2 =3 s, s3 = 14 m, t3 = 3 s, average speed =?

begin mathsize 12px style Average space speed equals fraction numerator Total space distance space traveled over denominator Total space time space taken end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals fraction numerator straight s subscript 1 plus straight s subscript 2 plus straight s subscript 3 over denominator straight t subscript 1 plus straight t subscript 2 plus straight t subscript 3 end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals fraction numerator 18 space straight m plus 22 space straight m plus 14 space straight m over denominator 3 space straight s plus 3 space straight s plus 3 space straight s end fraction rightwards arrow Average space speed equals 6 space straight m divided by straight s end style

Answered by | 10 Jun, 2016, 01:00: PM

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