Homework Help: physics emergerncyy!

Posted by joe on Saturday, November 19, 2011 at 11:23pm.

A particle of mass m1 = 2.5 kg moving along the x axis collides with a particle of mass m2 = 4.7 kg initially at rest. The incoming particle is deflected in the direction 24 degrees above the x axis, whereas the target particle moves off at 14 m/s at 39 degrees below the x axis. What are the initial and final speeds of the 2.5 kg particle?

physics emergerncyy! - Matt, Sunday, November 20, 2011 at 12:55am
use the eqn v2'=v1(2*m1/(m1+m2))
This eqn is specially derived fro elastic collisions where v2=0.
The speeds should be components; north, south, east, west or up, down, leftm, right etc.
Anyways, find the components and then use pythagorean theroem.
(once you have v1, you can use several eqna, like m1v1+m2v2=m1v1'+m2v2')

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