Ashell is fired from the ground with an initial speed of 1.70x10^3 m/s at an initial angle of 55.0° to the horizontal, neglecting air resistance, what is the shell's horizontal range and the amount of time the shell is in motion?

range = 276.8 km, time = 142 s

Explanation:

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.