Two objects having the same mass, m$=570$ g are dropped from rest. Mass m$1$ is positively

charged, Q$1=+750$ C $,$ while m$2$ is negatively charged, Q$2=750.$ C$.$ Ignore air resistance

and the take the electric field near the surface of the Earth to be approximately $"$

$!"$#$$\%=$

$150*$

a$.$ The Electric Force is conservative, use the conservation of energy to derive an

equation for the velocity. $[3$ points$]$

b$.$ Using the derived equation, calculate the final velocities for each mass.

$[4$ points$]$

c$.$ After the masses has fallen a distance of h $=3\mathrm{.}50$m$,$ determine the diMerence in the

speed between m$1$ and m$2.$