direction: fill in the blanks with a sentence.
1) action:________________________
reaction:the nail exert force on the hammer.
2)action:__________________________
reaction:the refrigerator pushes the man backwards.
3) action:the fists exert force on the jaw.
reaction:____________________________
4) action:the book exert force on the table
reaction:___________________________
5) action:___________________________
reaction:the ball pushes the baseball bat.