One reason that a gecko (a small lizard with a mass of around \(75\) grams) can walk across a ceiling is the electric force. If we assume the magnitude of the electric field acting on the gecko is \(10^6 \mathrm{~N/C}\text{,}\) determine the net charge on the gecko’s feet.
A massless horizontal spring is attached to a support at one end and has a \(+2.0 \mathrm{~\mu C}\) charge glued to the other end. A \(+4.0 \mathrm{~\mu C}\) charge is slowly brought near. The spring has compressed \(1.2 \mathrm{~cm}\) when the charges are \(2.6 \mathrm{~cm}\) apart. What is the spring constant of the spring?
Choose one of the equations that you made use of during this unit on electric fields. Identify a similar model or equation that you have used previously when studying the gravitational field. Write a few sentences comparing and contrasting the electric field and gravitational field.
