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CBSE Class 9 Answered

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Asked by | 14 Sep, 2008, 01:23: PM
answered-by-expert Expert Answer

Using equation of motion ,v2 = 2gh 

Let time taken for its velocity to double is t.

2v=v+gt

t=v/g

And it further falls by a distance s=ut+1/2gt2 =v(v/g)+1/2g(v2 /g2 )=3v2 /2g =3h

So total distance it falls =3h+h=4h

 

Answered by | 14 Sep, 2008, 09:53: PM

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