Oh...and the ones in the check are not correct. Please check feedback section fo

Question

Oh...and the ones in the check are not correct. Please check feedback section for info on picking the correct answer.

> 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 Deductions Potential External forces cannot change the momentum of an system. 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 Submissions Attempts remaining: 1 (5% per attempt) detailed view before the collision The internal forces cancel out the external forces of gravit 5% 5% 5% 5% Submit Feedback I give up! Hints: 2%, deduction per hint. Hints remaining:- Feedback: 1 for a 0% deduction Submission History Hints Totals Feedback Note: Feedback not accessed. Answer Then the total momentum after the collision is approximately the same as it was before the collision. Defining systems is arbitrary and we have isolated gravity from this case., The intemal forces cancel out the external forces of gravity 1 5% 0% 096 | 5% We can't isolate gravity from something, it is an extenal force and it is acting on the baseball Think about the time for the collision: it is large? Can gravity significantly change momentum in this case? Which internal force will cancel out the force of gravity? When an object is sitting on the floor, this force is provided by a contact force, but there is no such contact force in this situation. Note: Feedback not accessed. 2 5% 0% 0% | 5% 3 5% 0% 096 | 5% Defining systems is arbitrary and we have isolated gravity from this case., Then the total momentum after the collision is approximately the same asi was before the collision., The intemal forces cancel out the external forces of gravity 4 5% 0% Note: Feedback not accessed. 096 | 5% 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 the collision., The internal forces cancel out the external forces of gravity

Explanation / Answer

Second and fourth statements are correct.

First statement is wrong because external force can change momentum . Third and fifth are wrong as explained in feedback.

The momentum will be conserved because gravity force is very small as compared to internal forces.

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