Discover how pushes and pulls make things move, stop, and change direction in this fun Grade 4 science lesson on forces and motion.
Learning Goals
By the end of this lesson, you will be able to:
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Define a force as a push or a pull
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Explain how forces make objects start moving, stop, or change direction
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Identify examples of forces in everyday life and sports
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Describe how the size of a force affects how an object moves
Before You Start
Before this lesson, you should know:
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You should know that objects can move from one place to another
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You should be able to describe something as fast or slow
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You should know the difference between heavy and light objects
Key Words
Important words to know for this lesson:
Force
A push or a pull that can make an object move, stop, or change direction.
Motion
When an object changes its position — in other words, when it moves.
Push
A force that moves an object away from you, like pushing a shopping cart. 🛒
Pull
A force that moves an object toward you, like pulling a wagon.
Friction
A force that slows things down when two surfaces rub against each other.
The Big Idea: Forces Make Things Go!
A force is simply a push or a pull, and forces are what make objects start moving, stop moving, or change direction. ⚽
Pushes and Pulls: Every force is either a push (moving something away) or a pull (bringing something closer). Kicking a ball is a push; dragging a sled is a pull.
Starting and Stopping: An object stays still until a force moves it, and a moving object keeps going until a force stops it, like a goalie catching a ball.
Changing Direction: A force can make a moving object turn or go a different way, like hitting a tennis ball with a racket.
Bigger Force, Bigger Change: The harder you push or pull, the more an object speeds up or moves. A gentle tap moves a ball slowly; a strong kick sends it flying.
Friction Slows Things Down: Friction is a force that works against motion. A ball rolling on grass stops faster than one rolling on smooth ice.
Example
When you ride a bike, you push the pedals to go. When you squeeze the brakes, friction is a force that slows you down and stops you. 🚲
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This diagram shows a push force moving a ball away and a pull force bringing a cart closer.
Let's Try It Together!
Basic
You push a toy car with a force of 3 newtons to the right. Your friend pushes it with 2 newtons to the right. What is the total force on the car, and which way does it move?
Let's Try a Harder One!
Intermediate
In a game of tug-of-war, the red team pulls with 8 newtons to the left. The blue team pulls with 5 newtons to the right. What is the overall force, and which team wins?
Your Turn to Practice
Try this one yourself — use the hint if you get stuck:
Two kids push a wagon. One pushes forward with 6 newtons, and the other pushes forward with 4 newtons. What is the total force, and which way does the wagon go?
In the Real World
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When you kick a soccer ball, your foot pushes a force on it, making it speed across the field.
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A slide uses gravity to pull you down, and friction slows you at the bottom.
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Squeezing your bike brakes adds friction to the wheels, which stops the bike.
Quick Check
Test your understanding — tap an answer to check:
Q1.What is a force?
Q2.Which force pulls things down toward Earth?
Q3.What does friction do to a moving object?
Challenge Question
Optional
Stretch your brain — this one's a bit harder!
You roll two identical balls across the floor with the same push. One rolls on smooth tile and the other on a fuzzy carpet. Which ball travels farther, and why?
Key Takeaways
1.A force is a push or a pull that can make objects start moving, stop, speed up, slow down, or change direction.
2.Gravity is a force that pulls objects down toward Earth.
3.Friction is a force that slows down moving objects when two surfaces rub together.
4.The bigger the force you apply, the more an object's motion changes.
Printable Cutouts
Matched to this lesson — untick anything you don't need, then print.
AI matched
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Ready to Practice?
Now that you've learned Forces & Motion, put it to the test with a quick quiz!