Homework 7 Begin Date: 3/162018 9.00:00 AM-Due Date: 4/3/2013 11:59.00 PM End Da
ID: 2035475 • Letter: H
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Homework 7 Begin Date: 3/162018 9.00:00 AM-Due Date: 4/3/2013 11:59.00 PM End Date: 4/3/2018 11:59.00 PM (696) Problem 7: when we study the interaction of a baseball with a bat, we frequently ignore the action of gravity on the ball since gravity is an external force to the ball-bat system, it would seem that momentum is not actually conserved during this interaction. Which of the following statements are correct about this situation (select all that apply)? Grade Summary The internal forces are much greater than the external forces. Defining systems is arbitrary and we have isolated gravity from this case. Then the total momentum after the collision is approximately the same as it was before Deductions 09 Potential100 Submissions Attempts remaining the collision. ?The internal forces cancel out the external forces of gravity % per attempt) External forces cannot change the momentum of an system detailed view 0% 096 0% 0% Submit | Ha* | Feedback| Ipse up! Hints: deduction per hint Hints remaining 1 Feedback: 2%" deduction per feedback.Explanation / Answer
Since gravity is an external force to the ball-bat system, it would seem that momentum is not actually conserved during this interaction .
Following two option are correct.
The internal forces are much greater than the external forces.
Then the total momentum after the collision is approximately the same as it was before Potential the collision.
During calcution we ignore the gravity force mg for best approximation to conserve the momentum.
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