Answer to Question #162407 in Physics for Andu

Question

5. Two wagons with masses 10t and 30t, connected with a compressed spring, move in the horizontal plane with a speed of 4m / s.

Find the size and velocity of the second wagon when the first wagon is in place. Friction is not taken into account.

Answer 1

It is interesting what is meant by 'when the first wagon is in place.'

But we can imagine this scenario: the first wagon stops immediately. Right at this moment, the speed of the second wagon will be still 4 m/s decreasing to 0.