Entry Test MCQ :: Motion and Force

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A body is falling freely under gravity. How much distance it falls during an interval of time between 1st and 2nd seconds of its motion, taking g=10?

[A].	14 m	[B].	20 m
[C].	5 m	[D].	25 m

Answer: Option A

mteen hadir said:

how the answer of this question is 14m

jav said:

m also cnfused can any one can explain it plxe

Naveed said:

as g=10 m/s^2 so we have 10m distance in first second.... and 10+10=20 in 2 seconds.... now take average of both... 20+10/2 gives 15..... answer is 14 because they took g=9.8 ..... hope you understand.....

Hina Narjis said:

Thank u 4 explanation bro Naveed

iltaf said:

can u explain according to which formula ans is 14"?

bhunesla said:

Yup me also used ds formula but emmm still confused how it became 15 when ans iz 15