Answer from the text agrees with what I got. You are picturing them heading in the wrong directions. They are both heading towards each other. Andy is headed south-east (-y) and Sam is headed north-east (+y). The -2.5 degrees tells me that it's below the horizontal which is what my text...
Alright, so I got:
-0.3452/7.77 = vfsinσ/vfcosσ
-0.0444 = tanσ
-2.5 degrees for σ
Does that imply it's below the horizontal?
Also, followed the instructions on adding the equations together and then squaring. It wasn't until I got to the end that I remembered that sin squared + cos...
Homework Statement
Andy (mass 92 kg) and Sam (mass 75 kg) are both on toboggans (each toboggan has a mass of 4.6 kg) traveling on a crash course towards each other. Just as they hit, they lock hands so they move together as one. What is their new speed? In what direction do they travel?
mA =...
That is a big mistake.. yes I see what you're saying. Completely removing v1' was totally incorrect but I lucked into the answer in the end.
So I should originally isolate the variable that is both unknown and unwanted in the final solution? Then substitute that into the other equation and...
No typo. I get the answer that is given in the text doing what I did. I'm looking for m2. If you get it the other way around, you've already solved the question, haven't you?
0+m2v = m + m2(-v/5)
m = m2v + m2v/5
m = 6m2v/5
I removed v1' entirely instead of eliminating it because I...
I got:
m = (6m2v)/5)
Now I'm supposed to substitute into the equation for conservation of energy..
I end up at the end with:
0 = v((6m2)/5) - ((24m2v)/25))
Therefore, v = 0 or v = 5/4
Sub back into original equation:
m = (6m2v)/5
m = (6m25)/5*4
m2 = 2m/3
Now, my main...
Homework Statement
Two nuclei make a head-on elastic collision. One nucleus (mass m) is initially stationary. The other nucleus has an initial velocity (v) and a final velocity of (-v/5). What is the mass of this nucleus?
Homework Equations
conservation of momentum...