Test:128 QNo:1

JEE Mains 2015 Discussion Forum › Disucss Test Questions questions › Test:128 QNo:1

A body moves at 100km/s.
The coefficient of friction between the ground and the body is 1.
It has a mass of 100kg.
What distance will it travel before it stops?

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Anirudh Kumar ·2009-10-25 00:12:17

by solving newton's way

u= 10⁵ m/s
a= ug= 10

s= u²2a

= 5*10⁹

i think it is a misprint and it should be 100 m/s

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Bicchuram Aveek ·2009-10-25 00:18:16

if it's 100m/s then i think answer should be 500 m.

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Anirudh Kumar ·2009-10-25 04:45:28

please tell what mistake i have done in my solution .

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bakshisubhomoy ·2009-10-25 06:10:00

if u=100 m/s , then,

s=100²/2a
=10⁴/20
=10³/2
=500m

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Test:128 QNo:1

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