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A 2.85 kg stationary package explodes into three parts that then slide across a frictionless floor. The package had been at the origin of a coordinate system. Part 1 has mass m1 = 0.500 kg and velocity (10.0 + 12.0) m/s. Part 2 has mass m2 = 0.750 kg, a speed of 13.5 m/s, and travels at an angle 115° (counterclockwise from the positive direction of the x axis.)
(a) What is the speed of part 3?

(b) In what direction does it travel?
___________° counterclockwise from the positive direction of the x axis

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    An elevator cable can withstand a maximum tension of 1.89×104N before breaking. The elevator has a mass of 480kg and a maximum acceleration of 2.25m/s^2 . Engineering safety standards require that the cable tension never exceed two-thirds of the breaking tension.

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