A 0.4-kg toy train car moving forward at 3 m/s collides with and sticks to a 0.8-kg toy car that is traveling in the opposite direction at - 2 m/s. What is the size and direction of the final velocity of the two cars

Question

Physics

Skyler Lopez

7 January, 14:52

A 0.4-kg toy train car moving forward at 3 m/s collides with and sticks to a 0.8-kg toy car that is traveling in the opposite direction at - 2 m/s. What is the size and direction of the final velocity of the two cars

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Alex Fuller · Answer 1

After collision both move at velicity v

total momentum before = after

0.4 (3) + 0.8 (-2) = (0.4+0.8) v

if v is positive it moves forward, otherwise it moves in the opposite