Q. A negative charge of -6.0 10-6 C exerts an attractive force of 77 N on a second charge 0.054 m away. What is the magnitude of the second charge?
Q. The scale is set by Fs = 170 N. We release the block at x = 16.0 cm. How much work does the spring do on the block when the block moves from xi =+8.0 cm to (a)x=+6.0 cm, (b)x=-6.0 cm, (c)x=-8.0 cm, and (d)x=-11.0 cm?