posted by arcos15 on .
A sign whose weight is 95 lbs is held up by a chain.
(1) With what force does the chain need to be pulled up to keep the sign in place?
(2) Jenna writes a mathematical description,
95 lbs + - 95 lbs = 0. What does the sign of each number represent? MULTIPLE CHOICE
a).that one is a chain force and one is gravity
b).how much force is added or subtracted to her hand
c).the direction in which each force is exerted