8. Jax bounced a dodgeball off a wall. The dodgeball has a momentum of 32.6 kg · m/s after the collision. What is the total momentum of the system before the collision?

Explanation:

= Final momentum of the system =

According to the principle of conservation of angular momentum we have

The wall is not moving so the initial and final momentum of the system are equal.

So, the total momentum of the system before the collision is .

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.