Let’s go through each scenario one by one and match it to the correct Newton’s Law of Motion.
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Newton’s Three Laws (quick reminder):
1.
First Law (Law of Inertia): An object at rest stays at rest, and an object in motion stays in motion unless acted on by an unbalanced force.
2.
Second Law: Force = mass × acceleration (F = ma). The bigger the mass or the smaller the force, the less acceleration you get.
3.
Third Law: For every action, there is an equal and opposite reaction.
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Problem 1:
> The soccer ball is motionless on the ground. It remained motionless because no one kicked it.
→ This is about something staying still until a force acts on it. That’s
Newton’s First Law.
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Problem 2:
> The force of tennis racquet hitting the tennis ball is equal in magnitude and opposite in direction of the force of the tennis ball pushing back on the racquet...
→ “Equal and opposite” — that’s the key phrase for
Newton’s Third Law.
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Problem 3:
> The force of the tennis racquet hitting the tennis ball caused the tennis ball to change direction and move very fast...
→ A force caused a change in motion (acceleration) — this is
Newton’s Second Law. Even though we don’t have numbers, the idea is that force causes acceleration.
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Problem 4:
> The man pushed on the rock with a lot of force. The rock... did not move. The rock resisted the force.
→ The rock didn’t move even when pushed — meaning forces were balanced. The rock’s inertia kept it at rest. That’s
Newton’s First Law again.
*(Note: Some might think this is third law — but the key here is that the rock didn’t move, so net force was zero → first law. The third law would be “man pushes rock, rock pushes back equally” — which is true, but the question focuses on why it didn’t move.)*
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Problem 5:
> Julian and Dante pulled with equal forces on rocks of different masses. Smaller rock moved quickly; larger rock moved slowly.
→ Same force, different masses → different accelerations. That’s exactly what
Newton’s Second Law says: F = ma → if F is same, bigger m means smaller a.
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Now let’s write down the answers clearly:
Final Answer:
1. Newton’s First Law
2. Newton’s Third Law
3. Newton’s Second Law
4. Newton’s First Law
5. Newton’s Second Law
Parent Tip: Review the logic above to help your child master the concept of newton s law of motion worksheet.
