What is the charge on the ball
An electric field E=( 1.6×105 N/C, right ) causes the 5.0g ball in the figure to hang at a 20 degree angle. What is the charge on the ball?
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A 49.0 kg person takes a nap in a backyard hammock. Both ropes supporting the hammock are at an angle of 21.0 above the horizontal. Find the tension in the ropes.
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