A civil engineer is to design a road curve at a 189 m radius to carry racing cars traveling at 22 m/s. µ = 0.2 θ At what angle θ should it be banked for maximum control of the racing car? The coefficient of friction of the surface is 0.2 and the acceleration due to gravity is 9.8 m/s 2 . Answer in units of ◦ .

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

a and b sometimes have a positive value

prndulum needs thread, weight clock to time swings

answer is slate

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