A projectile is projected from the origin with a velocity of 30.0 m/s at an angle of 40.0 degrees above the horizontal. What is the position vector when the projectile is at the maximum height?
A. X = 45.2 m, Y = 19.0 m
B. X = 21.1 m, Y = 19.0 m
C. X = 51.1 m, Y = 21.1 m
D. X = 45.2 m, Y = 21.1 m
E. X = 19.0 m, Y = 17.5 m
A. X = 45.2 m, Y = 19.0 m
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Po? ? 
Po + X, what is X?
Fill in the blank(s) with the appropriate word(s).
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If a = 3.0 mm, b = 4.0 mm, Q1 = ?60 nC, Q2 = 80 nC, and q = 30 nC in the figure, what is the magnitude of the electric force on q?
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1.4 N
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d.
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e.
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