PhysicsGravity Pulls Everything Toward Earth
Atlas stands in a sunny backyard, tossing a red ball high into the air and watching it arc back down into his hands, with a tree, a fallen apple on the grass, and a swing set visible around him.
- Explain that gravity is a pulling force that acts on all objects near Earth.
- Identify the direction gravity always pulls — toward the center of the Earth.
- Predict that any dropped object will fall downward, regardless of its size or weight.
- Compare objects in free fall to objects resting on a surface to show gravity is always acting.
- Describe one everyday example that shows gravity at work.
Key terms
- gravity
- a force that pulls things downward
- force
- a push or a pull on something
- free fall
- when something drops with nothing holding it
- support force
- a push up that holds a thing in place
Gravity Always Pulls Down
Gravity is a force that always pulls things toward the center of the Earth. That direction is what we call down. Every object near Earth feels this pull all the time, even your shoes and your backpack. Gravity does not care how big or small a thing is. A heavy rock and a light feather both get pulled down. A feather falls slowly only because the air pushes against it, but gravity still pulls it down.
Falling and Being Held Up
When you let go of a ball, gravity pulls it straight down and it falls. When a book sits on a shelf, gravity still pulls it down, but the shelf pushes up just as hard to hold it. When you sit on a chair, gravity pulls you down while the chair pushes up. Gravity never turns off. The moment something has nothing holding it up, gravity pulls it down right away.
Worked examples
You drop a big rock and a small pebble at the same time. Which way do they fall?
- Gravity pulls all objects toward the center of the Earth.
- That direction toward Earth's center is down.
- Size does not change the pull, so both feel gravity down.
Answer: Both the rock and the pebble fall straight down toward Earth.
A ball rests on a table. Is gravity still pulling on the ball?
- Gravity pulls every object near Earth, all the time.
- The table pushes up to hold the ball in place.
- The up push and the down pull balance, so the ball stays still.
Answer: Yes, gravity still pulls the ball down while the table pushes up.
Activity
Drag each object into the correct bucket: FALLS FREELY when released with nothing stopping it, or HELD UP BY SOMETHING that pushes or pulls against gravity?
Practice
Name one thing you saw fall down because of gravity today.
Explain what holds a book up on a shelf even though gravity pulls it.
Common mistakes to avoid
- gravity only pulls heavy thingsGravity pulls every object down, both heavy ones and light ones.
- gravity stops when a thing sits stillGravity never stops; something else just pushes up to hold the thing.
Check your understanding
You drop a large rock and a small pebble at the same time from the same height. Which direction does gravity pull each one?
A ball is sitting still on a table. Is gravity pulling on it?
Recap
Gravity is a force that always pulls things down toward the center of the Earth. It pulls on every object, big or small, all the time. Things fall when nothing holds them, and they stay put when something pushes up against gravity.
Reflect
Where did you notice gravity pulling something down around you today?