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erwinxa

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- An object having mass of 90 kg and traveling at a speed of 0.850c collides with a stationary object having mass 1400 kg. The two objects stick together. (8pts)
- a) Find the speed of the composite object.
- b) Find the mass of the composite object

*only*applied the momentum equation which was incorrect. What is troubling me, is why this approach and also why I cannot consider the "final" Mass to be the 900 + 1400 if I am only considering delta P.

Thank you.

EDIT: So I've read in another textbook, why M is simply not the sum, yay, and then follows why I should consider

*both*equations.

So I guess, my question now, simply is: since M is not the sum I should consider both. Is this correct?

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