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kateman
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Homework Statement
A neutron (m= 1.6 x10-27) moving with speed Vo strikes a stationary particle of unknown mass and rebounds elastically straight back along its path with a velocity of .7Vo. What is the mass of the struck particle?
Homework Equations
P initial = P final
Ke initial = Ke final
The Attempt at a Solution
alright i tried saying that the velocity imparted on the stationary particle was .3Vo but that gave me an answer of a mass of a neutron when the actual answer is 9.46 x 10-27.
i know: v1i = Vo
v2i = 0
v1f = .7Vo
but i am unsure as how to continue on from here. Please help.