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A car of mass 600 kg is moving at a speed of 20 m/s. It collides with a stationary car of mass 900 kg. If the first car bounces back at 4m/s, at what speed does the second car move after the collision ?​

Respuesta :

FulcrumAhsoka

Answer:

Vf = 16m/s

Explanation:

See image....

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Answer:

16m/s

Explanation:

(600kg*20m/s) + (900kg*0m/s) = [600kg*(-4m/s)] +900kg V2

12,000kgm/s + 0 = -2,400kgm/s + (900kg) V2

12,000kgm/s + 2,400kgm/s = 900kg V2

14,400kgm/s = 900kg V2

V2 = 14,400kgm/s / 900kg

V2 = 144m/s / 9

V2 = 16m/s

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