An equilateral triangle with side lengths of 0.50 m has a 5.0 nc charge placed at each corner. what is the magnitude of the electric field at the midpoint of one of the three sides? (a) 240 n/c (b) 180 n/c (c) 720 n/c (d) 480 n/c (e) 120 n/c

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?