I've got to watch what I say more closely. When describing forces on a body that are equal and in opposite direction, "cancel" is likely to communicate the obliteration or disappearance of the forces rather than that the effect is overcoming each other.
SOSC - I
"Forces Cancel"?!?!?!?!
ReplyDeleteI know. I think its bad enough when math (and chem) teachers tell kids units "cancel". I don't even know what that means. I think you might want to point that out today for the group. Make sure to ask it in the form of a question!