d2jsp
Log InRegister
d2jsp Forums > Off-Topic > General Chat > Homework Help > College Physics Rotational Motion And Law Of Gravi > Help Please
Add Reply New Topic New Poll
Member
Posts: 15,942
Joined: Aug 11 2007
Gold: 8,221.76
Oct 12 2015 05:55pm
Objects with masses of 245 kg and a 545 kg are separated by 0.500 m.

At what position (other than infinitely remote ones) can the 45.0-kg object be placed so as to experience a net force of zero?


im lost.... can any1 explain i did alot of work and keep getting it wrong

d^2= 5.45/2.45 (.25 - 0.1 +d^2)

d^2 = 0.55612 - 0.22245 + (5.45/2.45)

1.2245 d^2 - 0.22245 + 0.55612 = 0

idk where i messed up but using quadratic i keep getting wrong answers
Member
Posts: 12,427
Joined: Mar 4 2006
Gold: 5,077.00
Oct 12 2015 08:28pm
Haven't taken physics in years but I know math well this is what I got

http://postimg.org/image/v4krmn3l5/


Edit: let me know if you have any questions. I basically used formula and did algebra down to solution.

This post was edited by Xx Shin3d0wn xX on Oct 12 2015 08:29pm
Member
Posts: 15,942
Joined: Aug 11 2007
Gold: 8,221.76
Oct 13 2015 02:32pm
Quote (Xx Shin3d0wn xX @ Oct 12 2015 10:28pm)
Haven't taken physics in years but I know math well this is what I got

http://postimg.org/image/v4krmn3l5/


Edit: let me know if you have any questions. I basically used formula and did algebra down to solution.


holy shit thats it... thanks alot!

took me like 4 times of reworking the problem and i kept getting wrong answers..
Member
Posts: 12,427
Joined: Mar 4 2006
Gold: 5,077.00
Oct 13 2015 07:48pm
Quote (noob_whacker @ Oct 13 2015 03:32pm)
holy shit thats it... thanks alot!

took me like 4 times of reworking the problem and i kept getting wrong answers..



No problem I've always been happy to see all my degrees in math have tended to help with other subjects that I never really studied myself. I think you may have just been plugging into the wrong formula but if you ever need help feel free to pm me.
Go Back To Homework Help Topic List
Add Reply New Topic New Poll