Here are the matches for the items with the corresponding laws of motion:
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A. A fireman turns on his hose and is knocked backwards.
1. 3rd Law (For every action, there is an equal and opposite reaction.) -
B. It takes less force to move a ping pong ball than a bowling ball.
3. 2nd Law (F = ma; this explains how acceleration depends on mass and force.) -
C. A soccer ball will not move until a player kicks it.
2. 1st Law (An object at rest will stay at rest unless acted upon by a net external force.) -
D. If air lets out of a balloon quickly, it pushes down and the balloon moves up.
1. 3rd Law (For every action, there is an equal and opposite reaction.) -
E. F = ma
3. 2nd Law (This is the formula stating that force is equal to mass times acceleration.) -
F. A ball rolling down hill continues to roll until friction makes it slow to a stop.
2. 1st Law (An object in motion stays in motion unless acted on by an external force.)
So the organized matches can be summarized as:
- A - 3rd Law
- B - 2nd Law
- C - 1st Law
- D - 3rd Law
- E - 2nd Law
- F - 1st Law