A silk scarf and a glass rod are rubbed together for one minute. Once completed, the rod is said to be negatively charged.

1. The electrons will travel from the ________________ (scarf/rod) to the ________________ (scarf/rod).

1. The ________________ (scarf/rod) has a higher electron affinity.

1. The electrical force between scarf and the rod two charges would be _____________________ (attractive/repulsive).

1. Explain your responses to problems #1-3 below.

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A physics student then takes the negatively charged rod and witnesses that when placed next to a neutral piece of paper, the paper and the rod attract.

1. What happens within the paper that causes the objects to stick together? Draw in the charges on the paper and generate a written explanation.

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Charge A is -1.5x10^-5C, Charge B is + 2.35 x 10^-5 C, and Charge C is +7.0 x 10^-6 C. All charges are on a friction negligible surface.

1. Find the magnitude and direction of the electrostatic force that acts on Charge C from Charge A.

Given(s)	Unknown(s)	Equation(s)	Substitution(s)	Solution

1. Find the magnitude and direction of the electrostatic force that acts on Charge C from Charge B.

Given(s)	Unknown(s)	Equation(s)	Substitution(s)	Solution

1. Find the net force acting on Charge C from the combined electrostatic forces from Charge A and B.

Given(s)	Unknown(s)	Equation(s)	Substitution(s)	Solution