Question 4a of 15 1 Define Gravity 174666 Maximum Attempts. But since the earth is flatter not a perfect sphere there are some deviations in the direction of gravity because of that. 13 2 Gravitation Near Earth S Surface University Physics Volume 1 Electric and magnetic electromagnetic forces can. . B and C at or near Earths surface. Earths gravity often expressed as 98 meters per second square can also be expressed as the equivalent 98 Newton per meter. Near the Earths surface objects with different masses have the same acceleration due to gravity. As a mass is moved from A to B 100 joules of work are done against gravity. While the object is going up the net force on it is A Zero. That is an object of twice the mass will feel. So this is the elementary charge on an electron multiplied by the electric field strength on the surface of the Earth divided by the mass of an electron that I looked up with a sea...