What is the momentum of a 121.1-kg fullback running at a velocity of 3.091 m/s?

Using the formula for momentum your answer would come out to be:

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.