Valentina’s Motion Mission: Newton’s Three Laws

Materials Needed

• One toy car, small ball, or other rolling object
• A book or small box to make a ramp
• A smooth surface, such as a table or floor
• A balloon
• String, about 1 meter long
• Plastic cup or lightweight paper cup
• Several soft objects, such as cotton balls or crumpled paper
• Paper and pencil or crayons
• Optional: stopwatch or timer

Lesson Overview

Age: 8 years old

Learner: Valentina

Time: 40 minutes

Big Question: How do pushes and pulls make things move?

Learning Objectives

By the end of the lesson, Valentina will be able to:

• Describe Newton’s three laws of motion using simple words.
• Give one real-life example of each law.
• Test the laws by completing simple motion experiments.
• Explain how a push or pull can change an object’s movement.

Success Criteria

Valentina will be successful if she can:

• Explain that objects tend to keep doing what they are already doing.
• Explain that a bigger push usually creates a bigger change in motion.
• Explain that every push has a push back.
• Use evidence from at least two experiments to support her ideas.

Safety Note

Use soft objects and give the balloon plenty of space. Do not aim objects at people, pets, or breakable items.

Introduction: Get Ready for the Motion Mission — 5 Minutes

Hook

Ask Valentina:

“If you are sitting still and someone gives your chair a gentle push, what happens? What if they give it a stronger push?”

Invite her to act out sitting still, moving, stopping, and changing direction.

Tell Valentina What She Will Learn

Say:

“Today, you are a motion scientist. You will learn three rules discovered by Sir Isaac Newton. These rules help explain why bicycles move, why balls bounce, why rockets fly, and why we move when we push against the ground.”

Introduce the three laws in child-friendly language:

1. Law 1: Keep Doing It — Objects like to keep doing what they are already doing unless a push or pull changes things.
2. Law 2: Bigger Push, Bigger Change — A stronger push usually makes an object speed up, slow down, or change direction more.
3. Law 3: Push Back — When one object pushes another object, the second object pushes back.

Body: Explore the Three Laws

Part 1: I Do — Demonstrating Law 1: Keep Doing It — 7 Minutes

Place the toy car on a smooth surface. Give it a gentle push and watch it roll.

Ask:

• “What did the car do before I pushed it?”
• “What made it start moving?”
• “Why did it eventually stop?”

Explain:

“The car was resting, so it wanted to stay resting. When I pushed it, it started moving. It eventually stopped because the surface and air rubbed against it. This rubbing is called friction. Friction is a force that can slow things down.”

Quick Check

Ask Valentina to complete this sentence:

“An object that is resting tends to stay ______, and an object that is moving tends to keep ______.”

Expected answer: still; moving.

Part 2: We Do — Law 1 Investigation — 5 Minutes

Place a lightweight cup on a book or box. Put a small soft object, such as a cotton ball, on top of the cup. Quickly pull the cup sideways.

Observe what happens to the soft object.

Discuss:

• “Did the soft object move sideways with the cup?”
• “What did it try to do?”
• “What push or pull changed its motion?”

Connect the idea to everyday life:

“When a car stops quickly, your body may lean forward because your body was already moving. A seat belt helps keep you safe.”

Part 3: I Do and We Do — Law 2: Bigger Push, Bigger Change — 8 Minutes

Make a ramp by placing one end of a book under the toy car track. Test the car with two different pushes:

1. Give the car a gentle push.
2. Give the car a stronger push.

Ask Valentina to compare the results:

• Which car moved faster?
• Which car traveled farther?
• Did the stronger push make a bigger change?

Explain:

“Newton’s second law tells us that a force is a push or pull. A stronger force can cause a bigger change in movement. A lighter object may also be easier to move than a heavier object.”

Motion Scientist Challenge

Ask Valentina to predict what will happen before each test:

• “What will happen if we push the car gently?”
• “What will happen if we push it harder?”
• “What might happen if we put a small object inside the car to make it heavier?”

Have her record her observations with words, drawings, or simple arrows.

Part 4: You Do — Law 2 Design Challenge — 5 Minutes

Valentina chooses one challenge:

• Distance Challenge: Make the car travel as far as possible with one push.
• Target Challenge: Make the car stop near a soft object without touching it.
• Speed Challenge: Test whether changing the ramp height changes how fast the car moves.

Before testing, she makes a prediction. After testing, she explains whether the results matched her prediction.

Give feedback using specific language:

“You changed one force—the strength of the push—and carefully watched how the car’s motion changed.”

Part 5: I Do — Law 3: Push Back — 5 Minutes

Blow up a balloon but do not tie it. Hold the opening closed, then release it.

Ask:

• “Which way did the air move?”
• “Which way did the balloon move?”
• “Did the balloon move in the same direction as the air?”

Explain:

“Air rushed out in one direction, and the balloon moved in the opposite direction. The air pushed the balloon, and the balloon pushed back on the air. That is Newton’s third law.”

Connect it to real life:

• “When you jump, your feet push down on the ground, and the ground pushes you up.”
• “When you swim, you push water backward, and the water helps push you forward.”
• “A rocket pushes hot gases downward, and the gases push the rocket upward.”

Part 6: You Do — Balloon Motion Experiment — 3 Minutes

For a simple balloon rocket:

1. Thread the string through a straw or hold the balloon near the string.
2. Stretch the string between two safe points.
3. Blow up the balloon and hold the opening closed.
4. Release it and observe its movement.

Ask Valentina to explain:

“The balloon moved forward because it pushed air ______.”

Expected answer: backward or in the opposite direction.

Application Activity: Motion Detective — 4 Minutes

Read or act out each situation. Valentina identifies the law and explains why.

1. A soccer ball stays still until someone kicks it.
2. A harder kick makes a ball move faster.
3. A skateboarder pushes the ground backward and rolls forward.
4. Your body moves forward when a bicycle stops suddenly.

Suggested answers:

• Situation 1: Law 1
• Situation 2: Law 2
• Situation 3: Law 3
• Situation 4: Law 1

Assessment

Formative Assessment During the Lesson

• Ask Valentina to make predictions before each experiment.
• Listen for correct use of the words push, pull, force, motion, and friction.
• Ask her to explain what happened instead of only saying what she observed.
• Use the “thumbs up, sideways, or down” check after each law to show confidence.

Summative Assessment: The Three-Law Motion Mission

Ask Valentina to complete a mini poster or oral presentation titled “Newton’s Three Laws in My World.” For each law, she should include:

• The law in her own words
• A drawing or description of an example
• One observation from today’s experiments

Simple Rubric

Skill	Achieved	Practicing
Explains Law 1	Explains that objects keep their motion unless a force changes it.	Needs help explaining staying still or moving.
Explains Law 2	Explains that a stronger push causes a bigger change in motion.	Needs help connecting force and motion.
Explains Law 3	Explains that forces come in push-and-push-back pairs.	Needs help identifying the two opposite pushes.
Uses Evidence	Uses observations from at least two activities.	Needs prompts to connect observations to the laws.

Differentiation and Choice

Support for a Learner Who Needs More Help

• Use hand motions: hold still for Law 1, push harder for Law 2, and push hands apart for Law 3.
• Offer sentence starters:
  • “The object stayed still until…”
  • “A stronger push made the object…”
  • “The balloon moved because it pushed…”
• Allow Valentina to answer by drawing, acting, or speaking.
• Focus on one law at a time and repeat the experiments.

Extension for a Learner Ready for More

• Test how different surfaces affect friction.
• Compare a light car with a heavier car.
• Measure how far the car travels after gentle, medium, and strong pushes.
• Design a paper or balloon vehicle and explain how all three laws affect it.

Conclusion: Tell Valentina What She Learned — 3 Minutes

Recap

Ask Valentina to teach the three laws back to you using these prompts:

1. “What happens when an object is not pushed or pulled?”
2. “What happens when the push becomes stronger?”
3. “What happens when one object pushes another object?”

Finish with this summary:

• Law 1: Objects keep resting or moving unless a force changes them.
• Law 2: A stronger push usually causes a bigger change in motion.
• Law 3: Every push has a push back.

Exit Question

Ask:

“Which law did you see most clearly today, and what experiment showed it?”

Celebrate Valentina as a motion scientist by reminding her that Newton’s laws help explain everyday actions such as riding a bike, kicking a ball, jumping, swimming, and traveling in a car.