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## Homework Statement

http://hypertextbook.com/physics/mechanics/momentum-two-three/an-elastic-collision-in-2d.pdf [Broken]

## Homework Equations

P = MV

P= (r,θ)

p'=mv'

m

_{1}v

_{1}+ m

_{2}v

_{2}=m

_{1}v

_{1}' +m

_{2}v

_{2}'

## The Attempt at a Solution

(2.00kg)(13.42 m/s) + (1.00kg)(12.73 m/s) = (2.00kg)(v

_{1}')+ (2.00kg)(21.95 m/s)

26.84 kgm/s + 12.73 kgm/s = 2.00kg(v

_{1}') + 43.9 kgm/s

39.57 kgm/s = 2.00kg(v

_{1}') + 43.9 kgm/s

-4.33 kgm/s = 2.00kg (v

_{1}')

-2.165 m/s = v

_{1}'

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