Three point charges are placed at the following locations: +4q at the origin, -2q at (x = -2, y = 0, z = 0) and -20 at (x = 2, y = 0 and z = 0). a. find the force on a fourth charge 5q placed at (x = 4, y = 6, z = 2) 6. find the force on a fourth charge 5q placed at (x, y, z) c. find locations where the force is solely in the (i) x direction, (ii) y direction, (iii) z direction d. is there any place where the force on the test charge is zero?

Could someone . i have tried to solve myself but my calculation is off

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?