2 forces are acting on a body. I forgot the body doesn't it's position or shape, the forcesa)must be of equal magnitude b)must be parallel and opposite c)must add upto zero d)must be in a single line

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.

seeing the graph would