The following scenario will be the subject of the next two questions There is a
ID: 1510739 • Letter: T
Question
The following scenario will be the subject of the next two questions
There is a ball attached by two pieces of string to a rotating rod as shown in the image above.
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Which of the following forces does not belong on the free body diagram for the ball?
(a) mg (b) T1 (c) T2 (d) Frad
The correct answer is D. Please explain how you arrived at your answer.
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Which vector represents the net force on the ball?
(a) 1 (b) 2 (c) 3 (d) 4
The correct answer is B. Please explain how you arrived at your answer.
Explanation / Answer
A) In a free body diagram, the forces causing motion are represented, not those representing the movement . B) The resulting motion is the rotation of the ball around the bar, thus the net force is one that has the same direction of such movement.
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