- #1

geauxKTM

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## Homework Statement

.500kg ball attached to a cord that is 70 cm long. ball strikes a 2.5kg block at rest

what is the speed of the ball just before hitting the block

and collison is perfectly elastic find speed of ball and block after collision

## Homework Equations

## The Attempt at a Solution

Uo=MGY

(.5)(9.8)(.7)= 3.43J

Ko=0

Uf=0

J=.5(.5)v^2= 2.62

part b

2.62=V2f-V1f

1.31=.5V1f+2.5V2f

matrix on calc

V1f= -1.75

V2f=.87