Avertical spring stretches 4.4 cm when a 16-g object is hung from it. the object is replaced with a block of mass 22 g that oscillates up and down in simple harmonic motion. calculate the period of motion.

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

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?