An electrostatic paint sprayer contains a metal sphere at an electric potential of 25.0 kv with respect to an electrically grounded object. positively charged paint droplets are repelled away from the paint sprayer's positively charged sphere and towards the grounded object. what charge must a 0.445-mg drop of paint have so that it will arrive at the object with a speed of 12.7 m/s? assume that the droplet starts from rest at the positively charged metal sphere.