Two particles each of mass m and charge q are suspended by strings of length / from a common point. find the angle e that each string makes with the vertical. (assume 0 is small so sin 0~tan 0~0.) [hint: consider the vertical and horizontal components of the forces acting on each particle.]

Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?