Question

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?

Answer 1

3177 kg

Step-by-step 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