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kbward
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Homework Statement
A small car is moving at 1.3 m/s on an air track when it collides with a larger 3 kg cart at rest. After the collision, the small cart recoils at 0.850 m/s.
What is the speed of the large cart after the collision?
Homework Equations
m1V1i + m2V2i = (m1+m2)V2f
m1 = .2 kg
m2 = 3 kg
V1i = 1.3 m/s
V2i = 0
V1f = -.85 /ms
V2f = ?
The Attempt at a Solution
.2*1.3 + 3*0= (.2+3) V2f
.26 = 3.2 V2f
V2f = .26/3.2
V2f = .08125
My answer came back wrong. Where am I making a mistake?
Thanks