Mechanics

62

Lokesh Verma ·2009-02-14 22:11:14

v²/r=4/r²

v=2/√r

mv=m.2/√r

which is the momentum

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MAGIC MATH ROCKS ·2009-02-14 22:11:36

ek aur.......

A thin uniform rod of mass m and length is hinged at the lower end of a level floor and stands vertically. It is now allowed to fall, then its upper end will strike the floor with a velocity given by???????

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MAGIC MATH ROCKS ·2009-02-14 22:13:30

ohhhhhhh!!!!!!!!!!1

yeAH..... I HAD NEVER THOT OF CONVERTIN IT A TO V²/R

THANKU!! :)

2ND ONE 2 SEEMS EASY

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62

Lokesh Verma ·2009-02-14 22:17:02

mgL/2 = 1/2I Ï‰²

I=mL²/3

mgL/2=1/2 mL²/3 Ï‰²

g=L/3 Ï‰²

Ï‰L=√3gL where L is the height of the gate.

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MAGIC MATH ROCKS ·2009-02-14 22:29:23

oh k.... thnx........

so if v wer askd vel of mid - pt ans wud hav bn .5 *âˆš3gL..... rite??

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Lokesh Verma ·2009-02-14 22:35:36

yup :)

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