Mars has a radius of 3.397x10^6 m and has a mass of 6.42x10^23 kg. What is the gravitational field strength on Mars? *

What’s #16 asking me and how do i solve it?

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.