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cooper43
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Homework Statement
I was wondering if anybody might help me on this UNLESS i did this correct, but I'm not totally sure.
Well here's the question.
Jorge and Elizabeth are both going to the Antique Road show on PBS. Jorge pushes an antique desk weighing 300kg on a car to the right, while Elizabeth pushes a similar cart to the left with a dresser weighing 225kg. The mass of each cart is 500kg and Jorge pushes his with a speed of 3.0m/s and Elizabeth at a speed of 4.0m/s. If the cars collide and stick together then what is their final velocity and which direction are they headed?
Homework Equations
KE=1/2*m*v^2
P=mv
The Attempt at a Solution
Car 1
500kg+300kg=800kg
3.0 m/s to the left
KE=(.5)mv^2
KE=(.5)(800)(3.0)^2
KE=3600
Car 2
225kg+500kg=725kg
4 m/s to the right
KE=(.5)mv^2
KE=(.5)(725)(4.0m/s)^2
KE=5800
5800-3600=2200
KE=(.5)mv^2
2200=(.5)(mass of Car1 and 2, 1525kg)( v )^2
Solved using calculator
Answer
V=1.6986m/s to the right
Am I right?
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