At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
is the speed root of 2M?
v / rt 2
WAT IS r?
v / sqrt 2
|dw:1327070380181:dw|in this case only momentum conservation can be applied as kinectic energy is not conserved
that gives the initial momentum
|dw:1327070682895:dw|final momentum=M(vel+vel) as vel of both are same after collision
how come KE isnt conserved?
because inelastic collision involves lose of mechanical energy(k.e or p.e) it may be converted to some other form of energy like heat
ohhhh, but in elastic collision, energy is conserved?
YA IT IS CONSERVED
remember ENERGY IS ALWAYS SAME ONLY TRANSFERRED FRM ONE FORM TO ANOTHER
okay, got it, thanks! how did you get m(v+v) ?
i thought momentum conservation was m1v1 + m2v2 = m1v1f + m2v2f
ya that is wat i did here
initial momentum=final momentum
how did you get v sqrt 2?
NEVERMIND!!!! i get it, thanks sooo much again, you seriously helped a lot, especially since my final is in 1 hour...
how do you know when momentum is conserved?
when no external force acts here and in all collisions there is no external force in the system just transfer of enegy
so all collisions have its momentum conserved? even with a block attached to a spring and another block collides and sticks to it?
yes there it is plastic collision as the block sticks to the other just look for initial and final cases after collision ask urself is there only the initial force thta was given acting? thats it
what does the answer to the question mean?
when a body starts to move then it hits some other body,u just considert whether there is any external force acting on these bodies other than the initial force that was given for those bodies to move....
does air resistance count as an external force? last thing, i swear! how do you know when to use momentum conservation and energy and which to use first?
yes air resistance is an external force
for elastic collisions momentum and energy conserved for inelastic only momentum is conserved
okay, i think i got it now. thank you so much again! i really appreciate it!
no problem ALL THE BEST!