Question 2(Multiple Choice Worth 2 points) On my bike, I was able to travel 40 miles in one hour. From this information, we can determine the bike's

speed
velocity
acceleration
direction

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.

we need to know the time interval during which the force acts. impulse of force = momentum change