P. 4679. A small object of mass \(\displaystyle m\) and of charge \(\displaystyle q\) slides down frictionlessly along a slope of angle of elevation \(\displaystyle \alpha\) from a height of \(\displaystyle h\). From the midpoint of the slope, it enters into a region of uniform horizontal electric field, and it decelerates and stops at the bottom of the slope. Determine the magnitude of the electric field strength \(\displaystyle E\).
Deadline expired on 10 December 2014.