1/2) On the planet Gizmo, the inhabitants travel by high speed trains that run on air tracks much like the air track you used in lab. A train car with a mass of 8700 kg is traveling at 11.0 m/s when it strikes a second car moving in the same direction at 2.2 m/s. The two stick together and move off with a speed of 4.00 m/s. What is the mass of the second car? Explain reasoning 2/2) How much kinetic energy was lost in the collision?

Q: V 3m

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A: Rest mass of the car (m0)=1550 kg Speed of car (v)=15 m/s Speed of light (c)=25 m/s

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A: m1u1+mbub=m1+mbv                     v=m1u1+mbubm1+mb

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A: Given data:                     Mass of particl , m= 3.99μg…

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A: From Newton’s second law of motion.

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A: let the less massive car move left with a speed v after collision. before collision lets its speed…