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## Homework Statement

A neutron of mass 1.7 X 10^-27 kg travelling at 2.2 km/s, hits a stationary helium nucleus of mass 6.6 X 10^-27 kg. After the collision, the velocity of the helium nucleus is 0.53 km/s at 52° to the original direction of motion of the neutron. Determine the final velocity of the neutron.

## Homework Equations

pi1x+pi2x=pf1x+pf2x

pi1y+pi2y=pf1y+pf2y

## The Attempt at a Solution

I changed all the km/s to m/s since the answer is in m/s

(1.7X10^-27(2200)-6.6X10^-27(530cos52))/1.7X10^-27=vficos∅

933.18m/s=vficos∅

Well, it does not matter what i get for the y component since the answer 1.9 m/s and 933 is just too high.

So, is the answer wrong or did i do something wrong.