Question

When we observe two charged balloons dangling from thin thread, they can repel each other. We tend to use small thin water balloons so they behave the right way. The balloons accumulated approximately equal amounts of charge. If we touch them together they can share charge and have equal charge. You are going to hang the two charged balloons from a rod/stick, on a string hung over the rod—making an inverted V like picture. The balloons will then repel. The balloons we use have a mass of about 0.200grams each. Length of string is 28 cm. r is 13 between balloons.

1.

- a. Sketch of balloon setup

b. Free body force diagram with labels for balloon on the right (there are three forces, Tension, Gravity, and Electric).

- c. You have been shown how to do the calculations---determine the magnitude for each of the forces acting on the balloon (in Newtons—you’ll need to use scientific notation.

FT=

Fgrav=

Felctric= _

- d. What is the charge on the balloon (not charge squared, just charge on one balloon in Coulomb’s).

q= C

- e. How many electrons does it take to make this charge? # electrons=
- Please answer all questions and explain.
- Thank you.

Answer #1

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