a) the Earth rotates the other way.
b) the person hit is moved.
c) the ball stops, and the catcher moves slightly (maybe an extra force on his foot moving the Earth slightly)
d) the Ground moves.
Identify the action-reaction paris in the following situations:
a) a person takes a step
b) a snowball hits someone in the back
c) a footbal player catches a ball
d) a leaf falls to the ground
HELP
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