4. Shirley Bored sits in her seat in the English classroom. The force of gravity on Earth pulls
down on Shirley's body with 600 N of force. What is the direction and size of the reaction
force acting on Shirley?
According to Newton's third law, for every action their is an equal and opposite reaction. The equal and opposite reaction to a downward force of magnitude 600 N is an upward force of magnitude 600 N
