1. When a girl is sitting on a chair, the earth exerts a downward force on the girl and the chair exerts an upward force on the girl.
(a) These two forces DO NOT belong to the same action and reaction pair. Explain.
(b) State the two action and reaction pairs in the situation of sitting on the chair.
2. A skydiver jumps from a plane which is 6000M above the ground. He does not open the parachute for some time. Two forces A and B act on the skydiver when he is falling.
(a) Force A causes the skydiver to fall. Name force A and explain what does this force depend on.
(b) Force B opposes the motion of the skydiver. Name force B and explain what does this force depend on.
Thank you.