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2 air carts collide and stick together. cart one is M1 = 0.755 kg and initial...

2 air carts collide and stick together. cart one is M1 = 0.755 kg and initial speed of 0.435 m/s the cart to right is initially at rest with mass m2= 0.300kg.
a.find the velocity of the center of mass before the carts Collide and stick together
b. find the velocity of the center of mass after the carts Collide and stick together
c. find the kinetic energy of the system before and after the Collision

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