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One car of mass 1,765 kg is travelling at a speed of 28 m/s. This car runs into another car that is at rest and they stick together. The resulting wreck is moving at a speed of 10 m/s. What is the mass of the car that was originally at rest?

Respuesta :

Answer:

3177 kg

Explanation:

Conservation of momentum

momentum = mv     this will be the same before and after the wreck

1765 * 28 = 49420  kg - m/s

After, it will be the same

(1765 + m2) 10 = 49420

m2 = 3177 kg

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