Two point charges are fixed on the y axis: a negative point charge q1 = -24 µc at y1 = +0.19 m and a positive point charge q2 at y2 = +0.33 m. a third point charge q = +8.0 µc is fixed at the origin. the net electrostatic force exerted on the charge q by the other two charges has a magnitude of 18 n and points in the +y direction. determine the magnitude of q2.

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?