2) Two objects with masses, mi and m2, have the same kinetic energy and are both moving to the right. The same constant force F is applied to the left to both masses. If mi
= 4m2, the ratio of the stopping distance of m1 to that of m2 is ?

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?