Feel like a physics problem, anyone?

[CrackaLackaZe]

http://plaza.ufl.edu/zerix/1.bmp

I've been stuck for awhile on this one...any help would be appreciated, thx.

 

[Heisenberg]

Ehh...it's some demonic incarnation of conservation of momentum but I'm too tired to see how to do it. Sorry.

 

[CrackaLackaZe]

It's a center of mass problem, I'm so pissed...I'm letting this question own me.

 

[shadow]

you're a freshman in HS right?

 

[CrackaLackaZe]

No I'm not, do you know how to do the problem?

 

[Heisenberg]

Originally posted by: CrackaLackaZe
It's a center of mass problem, I'm so pissed...I'm letting this question own me.

Oh yeah, duh. I read the 37.4 as velocity, not displacement.

 

[shadow]

I haven't done physics in over 4yrs, but it seems pretty straightforward, just set up your equations to equal eachother and solve for her mass, you'll find stuff will cancel out. I'm sorry man, I don't believe in giving answers, but after you figure out the right equation it becomes easy.

good luck

 

[Bound_Vortex]

Easiest way to do it is to look at the changes in center of mass. Since Ricardo is the heavier of the two, we will treat his movement as positive and Carmelita's movement as negative.

mRicardo*dRicardo-mCarmelita*dCarmelita = (mRicardo+mCarmelita+mCanoe)*dTotal

70*3.1-x*3.1 = (70+x+27)*.374
217-3.1x = 36.278+.374x
-3.474x = -180.726
x = 52.02 kg = mass of Carmelita

 

[CrackaLackaZe]

Originally posted by: Bound_Vortex
Easiest way to do it is to look at the changes in center of mass. Since Ricardo is the heavier of the two, we will treat his movement as positive and Carmelita's movement as negative.

mRicardo*dRicardo-mCarmelita*dCarmelita = (mRicardo+mCarmelita+mCanoe)*dTotal

70*3.1-x*3.1 = (70+x+27)*.374
217-3.1x = 36.278+.374x
-3.474x = -180.726
x = 52.02 kg = mass of Carmelita

I see...thx, I didn't realize that the displacement of the canoe was the change in center of mass.