If a bouncing ball has a total energy of 20 j and a kinetic energy of 5 j, the ball’s potential energy isj. if the kinetic energy of the ball decreases, then the potential energy will

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

the force on the thing and the distance the force moves the thing