Chang sees the following formula on a website about Newton's second law.
What does the symbol EF in the formula indicate that
Chang needs to do?
ΣΕ
a =
m
He needs to find the net force acting on the object in a
direction.
He needs to use only forces acting in the direction of
motion.
He needs to combine the horizontal and vertical
forces.
He needs to multiply the horizontal and vertical
forces.