a The Expert TA HumanX+ usfi Class M | Hw 7 Begin Date: 3/1 2/2018 9:00:00 AM-Du

Question

a The Expert TA HumanX+ usfi Class M | Hw 7 Begin Date: 3/1 2/2018 9:00:00 AM-Due Date: 4/6/201 8 i 1:59:00 PM End Date: 462018 11:59:00 PM l Help %) Problem 18: Consider a collision of two billiard balls in which they approach at an angle (ie, not head- Assignment Status Click here for detailed view à Which of the following statements is true about this collision? Grade Sum The combined momenta along the x-axis must equal the momenta along the y-axis The combined momenta must always equal zero. The combined momenta in all directions are the same as before the collision Problem Status Submission Completed 2Completed Completed Completed Completed Completed Completed Completed Completed Submit Hint I give up Hints: deduction per hint Hints remaining Feedback: deduction per feedback

Explanation / Answer

Since, No external force is acting. So,

According to the Law of Conservation Of Momentum

The combined momenta in all directions are the same as before collision. (True)

and combined momenta will not be equal to zero as it is not zero before collision. Further more, the combined momenta before collision along the X axis will be equal to the combined momenta after collision along the X axis only. And same hold true for Y axis as well.

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