This problem explores the behavior of charge on realistic (i. e. non-ideal) insulators. We take as an example a long insulating rod suspended by insulating wires. Assume that the rod is initially electrically neutral. For convenience, we will refer to the left end of the rod as end A, and the right end of the rod as end B. In the answer options for this problem, "weakly attracted/repelled" means "attracted/repelled with a force of magnitude similar to that which would exist between two balls, one of which is charged, and the other acquires a small induced charge". An attractive/repulsive force greater than this should be classified as "strongly attracted/repelled".
A small metal ball is given a negative charge, then brought near (i. e., within a few millimeters) to end A of the rod. What happens to end A of the rod when the ball approaches it closely this first time?
Select the expected behavior.
strongly repelled
strongly attracted
weakly attracted
weakly repelled
neither attracted nor repelled
Now consider what happens when the small metal ball is repeatedly given a negative charge and then brought into contact with end A of the rod
After several contacts with the charged ball, how is the charge on the rod arranged?
Select the best description.
positive charge on end B and negative charge on end A
negative charge spread evenly on both ends
negative charge on end A with end B remaining almost neutral
positive charge on end A with end B remaining almost neutral
none of the above
Part C
How does end A of the rod react when the ball approaches it after it has already made several contacts with the rod, such that a fairly large charge has been deposited at end A?
Select the expected behavior.
strongly repelled
strongly attracted
weakly attracted
weakly repelled
neither attracted nor repelled
Answers: 3
Physics, 22.06.2019 19:00, Geo777
Abatter hits a 0.140-kg baseball that was approaching him at 30 m/s and, as a result, the ball leaves the bat at 40 m/s in the reverse of its original direction. the ball remains in contact with the bat for 2.0 ms. what is the magnitude of the average force exerted by the bat on the ball?
Answers: 1
Physics, 23.06.2019 02:50, raekwonpowell10
Orque can be calculated by multiplying the force (n) applied at 90ā to the lever arm at a distance (m) from the pivot point (point of rotation), the compound si unit for the torque is nā
m. if the force (at 90ā to the lever arm) applied is 15 n and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?
Answers: 2
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