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Shogun:
alright

asus:

--- Quote from: Shogun on May 25, 2009, 04:02:38 pm ---tutu is tht first variant or second

and i got 6x10^-7

by just deviding the velocity/frequency

        (3x10^8)
       ------------  = 6x10^-7
        (5x10^14)

--- End quote ---

yaa..i think yours is correct...
we need to simplify the bottom one first...
silly.. ::)

Shogun:
2a) put different value of masses on bothe sides of the pivot  but make sure tht after using the formula (fxd) (where f=force and d=distance) the product must be same. (then only they are balanced i.e in equilibrium)

 the distance are given for each hole to the pivot. so i recomend to take the first hole(with distance 4cm) and add mass 200g at one side of the pivot. and on the other side,  add mass 100g on the second hole (with disatnce 8 cm from teh pivot)

so when using the formula "fxd " u get on one side: 200x4=800N
                                                     and                                       
                                                   on the other side: 100x8=800N
                         - see both have the same product so it is now they are balanced(in equilibrium)


ans2b) the disc does not move or rotate as u put the mass so they are balanced so no turning effect which means no moment.

c)use formula "fxd"
               200x4=800N
               100x8=800N

d)this is the force of pivot which is downwar to get tht simply add the masses u put
100+800=900g

but rmember u can choose any mass at any distance but the product with equation "fxd" must be same

thts all,hope this helped, any confusion or difficulties or help u need, im all here

Tutu_93:
THaaaanx  ::)
Ill contiue solving nw .. just dont go lol

Shogun:
ur welcome ,and no prob,ill wait

dnt frgt to +rep me (man i hate sayin this ,it makes me feel im selfish, but it seems it works for others)

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