Exploration $1\mathrm{.}2$ Superposition

a$.$ Suppose you had two charged rods, one charged positively and one charged negatively,

about $3$ cm apart. Predict the relative magnitude and the direction of the electric field at

each point indicated in the diagram below. Explain your reasoning for your predictions.

b$.$ Check your predictions in part a in two ways.

i$.$ Observing the motion of a charged pith ball placed at each location.

ii$.$ Use the EMF field program.

Learning Goal:

If point $A$ is at the center, and $w=500lbs$ acting in the negative $z-$axis, find

Part A

The force in cable $AB.$

Express your answer in pounds to three significant figures.

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Part B

The force in cable $AC.$

Express your answer in pounds to three significant figures.

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Part C

The force in cable $AD.$

Express your answer in pounds to three significant figures.