If an object–spring system is hung vertically and set into oscillation, why does the motion eventually stop?

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

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?