In a closed system, an object with a mass of 10 kg moves at a velocity of 5.4 m/s. It collides with a second object that has a mass of 12 kg and that is moving in the opposite direction with a velocity of 3.5 m/s. What is the total momentum of the system after the collision?

Question

In a closed system, an object with a mass of 10 kg moves at a velocity of 5.4 m/s. It collides with a second object that has a mass of 12 kg and that is moving in the opposite direction with a velocity of 3.5 m/s. What is the total momentum of the system after the collision?

66 kg-m/s

12 kg-m/s

42 kg-m/s

54 kg-m/s

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1 answer
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Answer 1

Anonymous answered
2 years ago

The momentum after is EXACTLY THE SAME as before !!!

That is Newton's first law.
The system might lose energy, but it does not lose momentum.
If you slam into a house, the house moves a little:)
10 * 5.4 - 12 * 3.5
= 54 - 42
= 12 kg m/s
That is really, really important !!!