Ch09b Begin Date: 2/14/2018 12:01:00 AM-Due Date: 3/5/2018 10:15:00 AM End Date:
ID: 1581900 • Letter: C
Question
Ch09b Begin Date: 2/14/2018 12:01:00 AM-Due Date: 3/5/2018 10:15:00 AM End Date: 5/31/2018 12:00:00 PM (796) Problem 2: 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 momentums not actually conserved during this interaction. Which of the following statements are correct about this situation (select all that apply)? The internal forces cancel out the external forces of gravity. Deductions 0% Potential 100% 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 (4% per attempt) External forces cannotchange the momentum of an system. Hint I give up Feedback: 1te deduction per feedbackExplanation / Answer
The gravitational force is present in both initial and final conditions but since it is an external force it must have an impact on the momentum of the system .
However, the effect of gravity is very less, hence can be neglected such that the initial momentum is approximately equal to final momentum.