Answer on Question 83764, Physics, Other
Question:
A 9.0 kg mass is moving to the right with a velocity of 14.0 m/s. A 12.0 kg mass is moving to the left with a velocity of 5.0 m/s. Assuming that these two balls have a head on collision and stick together, what will be the final velocity of the combination?
Solution:
We can find the final velocity of the combination from the law of conservation of momentum:
here,
is the mass moving to the right,
is the mass moving to the left,
is the velocity of the mass moving to the right,
is the velocity of the mass moving to left,
is the final velocity of the combination.
Let's choose the direction to the right as the positive. Then, we can write:
Finally, let's substitute the numbers:
Answer:
.
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