Friday, 7 a.m., a conversation between me, my son Deck (15) and my son Cal (17)
Someone drops a spoon.
Cal: It’s weird to think that, when two objects collide, they come off each other with equal momentum.
Deck: When that spoon just hit the table–they came away from the impact with equal momentum.
Me: But the table didn’t move. It has four legs. It was still.
Cal: Not equal speed, Mom. Momentum. Momentum is conserved.
Deck: Mom, you have to think about everything happening in a vaccuum.
Cal: Yeah, a vaccuum.
Me: Well, I don’t spend a lot of time with vaccuums . . . we have mostly hardwood.
Me: That’s a little housekeeping humor for you right there.