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Q1. Three charges, q1, q2, and q3, are located at the corners of an equilateral triangle with side length of 1.55 m. Find the work done in each of the following cases:

a) to bring first particle, q1 = 1.85 pC, to P from infinity

b) to bring second particle, q2 = 2.43 pC, to Q from infinity

c) to bring last particle, q3 = 3.65 pC, to R from infinity

d) Find the total potential energy stored in final configuration of q1, q2, and q3

Q2. An object of mass "m" is thrown up an inclined plane of angle "theta" with an initial velocity "v knot". If the motion is resisted by retarding force Fr=-kv (where k is a force coefficient and v the velocity of the object.)

a.) How long and

b.) How far will the mass travel before coming to rest?

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