Newtons 3 Laws - Identification Worksheet | Science 10th Grade - Free Printable
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Step-by-step solution for: Newtons 3 Laws - Identification Worksheet | Science 10th Grade
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Show Answer Key & Explanations
Step-by-step solution for: Newtons 3 Laws - Identification Worksheet | Science 10th Grade
Let’s go through each question one by one. For each, we’ll figure out which of Newton’s 3 Laws it matches and explain why in simple terms.
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1. Sally rolls two balls — a heavy bowling ball and a light tennis ball. She notices that it is much easier to roll the tennis ball.
→ This is about how mass affects motion when you apply force. The heavier object (bowling ball) resists moving more than the lighter one (tennis ball). That’s Newton’s Second Law: Force = Mass × Acceleration. More mass means you need more force to get the same acceleration.
✔ Answer: Newton’s Second Law
Explanation: Heavier objects are harder to move because they have more mass. You need more force to accelerate them.
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2. A car slides out of control on ice.
→ On ice, there’s very little friction. So once the car starts sliding, it keeps going unless something stops it. That’s Newton’s First Law — an object in motion stays in motion unless acted on by an outside force.
✔ Answer: Newton’s First Law
Explanation: Without friction (the “outside force”), the car doesn’t stop — it just keeps sliding.
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3. John notices that if he gives a box a harder push, it moves faster across the ground.
→ Harder push = more force → more acceleration. Again, this is Newton’s Second Law. More force leads to more speed change.
✔ Answer: Newton’s Second Law
Explanation: Pushing harder makes the box speed up more — that’s exactly what F=ma says.
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4. Ashely paddles her kayak — she pushes water backward to go forward.
→ When she pushes the water back, the water pushes her forward. That’s action and reaction — Newton’s Third Law.
✔ Answer: Newton’s Third Law
Explanation: Every action has an equal and opposite reaction. Push water back → water pushes you forward.
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5. A 35,000-pound truck needs a larger engine than a 2,000-pound car.
→ Bigger mass needs bigger force to move or accelerate. That’s again Newton’s Second Law.
✔ Answer: Newton’s Second Law
Explanation: Heavy trucks need powerful engines to overcome their large mass and accelerate.
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6. Jasmine kicks a soccer ball — it travels but then stops.
→ Why does it stop? Because of friction and air resistance — forces acting against its motion. But the key idea here is that without those forces, it would keep going. So this illustrates Newton’s First Law — objects don’t stop on their own; something must stop them.
✔ Answer: Newton’s First Law
Explanation: The ball would keep rolling forever if not for friction and air slowing it down.
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7. Dwayne throws a ball down — it bounces back up.
→ When the ball hits the ground, the ground pushes back up on it. Action (ball hits ground) → Reaction (ground pushes ball up). That’s Newton’s Third Law.
✔ Answer: Newton’s Third Law
Explanation: The ground exerts an upward force on the ball when it lands — that’s why it bounces.
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8. To make a rocket go into the air, NASA engineers point it directly upwards prior to launch.
→ Rockets work by pushing gas downward — and the gas pushes the rocket upward. That’s Newton’s Third Law. Also, pointing it up ensures the thrust goes straight up to overcome gravity.
✔ Answer: Newton’s Third Law
Explanation: Rocket pushes exhaust down → exhaust pushes rocket up. Equal and opposite forces.
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9. Trisha swings her racquet harder — the tennis ball travels faster.
→ Harder swing = more force → ball accelerates more. Classic Newton’s Second Law.
✔ Answer: Newton’s Second Law
Explanation: More force from the racquet means the ball speeds up more after being hit.
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10. Kyle’s car collides — he keeps moving forward until his seatbelt stops him.
→ His body wants to keep moving even though the car stopped. That’s inertia — Newton’s First Law. The seatbelt provides the outside force to stop him.
✔ Answer: Newton’s First Law
Explanation: Your body keeps moving forward during a crash unless something (like a seatbelt) stops you.
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Final Answer:
1. Newton’s Second Law – Heavier objects need more force to move.
2. Newton’s First Law – Objects stay in motion unless stopped by a force like friction.
3. Newton’s Second Law – More force causes more acceleration.
4. Newton’s Third Law – Pushing water back moves the kayak forward.
5. Newton’s Second Law – Big mass needs big force to accelerate.
6. Newton’s First Law – Ball stops due to external forces like friction.
7. Newton’s Third Law – Ground pushes ball up when it hits.
8. Newton’s Third Law – Rocket pushes gas down, gas pushes rocket up.
9. Newton’s Second Law – Harder hit = faster ball.
10. Newton’s First Law – Body keeps moving forward until seatbelt stops it.
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1. Sally rolls two balls — a heavy bowling ball and a light tennis ball. She notices that it is much easier to roll the tennis ball.
→ This is about how mass affects motion when you apply force. The heavier object (bowling ball) resists moving more than the lighter one (tennis ball). That’s Newton’s Second Law: Force = Mass × Acceleration. More mass means you need more force to get the same acceleration.
✔ Answer: Newton’s Second Law
Explanation: Heavier objects are harder to move because they have more mass. You need more force to accelerate them.
---
2. A car slides out of control on ice.
→ On ice, there’s very little friction. So once the car starts sliding, it keeps going unless something stops it. That’s Newton’s First Law — an object in motion stays in motion unless acted on by an outside force.
✔ Answer: Newton’s First Law
Explanation: Without friction (the “outside force”), the car doesn’t stop — it just keeps sliding.
---
3. John notices that if he gives a box a harder push, it moves faster across the ground.
→ Harder push = more force → more acceleration. Again, this is Newton’s Second Law. More force leads to more speed change.
✔ Answer: Newton’s Second Law
Explanation: Pushing harder makes the box speed up more — that’s exactly what F=ma says.
---
4. Ashely paddles her kayak — she pushes water backward to go forward.
→ When she pushes the water back, the water pushes her forward. That’s action and reaction — Newton’s Third Law.
✔ Answer: Newton’s Third Law
Explanation: Every action has an equal and opposite reaction. Push water back → water pushes you forward.
---
5. A 35,000-pound truck needs a larger engine than a 2,000-pound car.
→ Bigger mass needs bigger force to move or accelerate. That’s again Newton’s Second Law.
✔ Answer: Newton’s Second Law
Explanation: Heavy trucks need powerful engines to overcome their large mass and accelerate.
---
6. Jasmine kicks a soccer ball — it travels but then stops.
→ Why does it stop? Because of friction and air resistance — forces acting against its motion. But the key idea here is that without those forces, it would keep going. So this illustrates Newton’s First Law — objects don’t stop on their own; something must stop them.
✔ Answer: Newton’s First Law
Explanation: The ball would keep rolling forever if not for friction and air slowing it down.
---
7. Dwayne throws a ball down — it bounces back up.
→ When the ball hits the ground, the ground pushes back up on it. Action (ball hits ground) → Reaction (ground pushes ball up). That’s Newton’s Third Law.
✔ Answer: Newton’s Third Law
Explanation: The ground exerts an upward force on the ball when it lands — that’s why it bounces.
---
8. To make a rocket go into the air, NASA engineers point it directly upwards prior to launch.
→ Rockets work by pushing gas downward — and the gas pushes the rocket upward. That’s Newton’s Third Law. Also, pointing it up ensures the thrust goes straight up to overcome gravity.
✔ Answer: Newton’s Third Law
Explanation: Rocket pushes exhaust down → exhaust pushes rocket up. Equal and opposite forces.
---
9. Trisha swings her racquet harder — the tennis ball travels faster.
→ Harder swing = more force → ball accelerates more. Classic Newton’s Second Law.
✔ Answer: Newton’s Second Law
Explanation: More force from the racquet means the ball speeds up more after being hit.
---
10. Kyle’s car collides — he keeps moving forward until his seatbelt stops him.
→ His body wants to keep moving even though the car stopped. That’s inertia — Newton’s First Law. The seatbelt provides the outside force to stop him.
✔ Answer: Newton’s First Law
Explanation: Your body keeps moving forward during a crash unless something (like a seatbelt) stops you.
---
Final Answer:
1. Newton’s Second Law – Heavier objects need more force to move.
2. Newton’s First Law – Objects stay in motion unless stopped by a force like friction.
3. Newton’s Second Law – More force causes more acceleration.
4. Newton’s Third Law – Pushing water back moves the kayak forward.
5. Newton’s Second Law – Big mass needs big force to accelerate.
6. Newton’s First Law – Ball stops due to external forces like friction.
7. Newton’s Third Law – Ground pushes ball up when it hits.
8. Newton’s Third Law – Rocket pushes gas down, gas pushes rocket up.
9. Newton’s Second Law – Harder hit = faster ball.
10. Newton’s First Law – Body keeps moving forward until seatbelt stops it.
Parent Tip: Review the logic above to help your child master the concept of newton laws worksheet middle school.
