GRAVITY
What is the force that pulls objects toward Earth?
Gravity
What is the force that slows or stops motion when two surfaces rub together?
FRICTION
What word means “a change in position”?
MOTION
When you ride a bike and stop pedaling, what force eventually makes the bike stop?
FRICTION
What is mass a measure of?
The amount of matter in an object.
True or False: Gravity works only on heavy objects.
False – Gravity works on all objects, no matter their size.
Which surface has more friction: ice or sandpaper?
SANDPAPER
If you push a ball harder, what happens to its speed?
It moves faster.
Why do playground slides have smooth surfaces?
To reduce friction so you can slide down easily.
True or False: A bigger object always has more mass than a smaller object.
False – Size doesn’t always mean more mass (think of a balloon vs. a rock).
Why does a ball roll down a hill instead of up?
Gravity pulls the ball downward toward Earth.
Why do cars have tires with tread instead of smooth tires?
Tread increases friction, helping the car grip the road.
Which would require more force to move: a heavy box or a light box?
The heavy box, because it has more mass
A toy car rolls farther on a wood floor than on carpet. Why?
Carpet has more friction, which slows it down faster.
If you double the mass of a block, what happens to friction?
Friction doubles because the block presses harder on the surface.
If you throw a ball up in the air, why does it come back down?
Gravity pulls it back down to the ground.
If you slide a book on a smooth table and a rough carpet, on which surface will it stop faster and why?
The carpet, because it has more friction slowing the book down.
Why does an object keep moving after you stop pushing it, like a rolling ball on the ground?
It keeps moving until friction or another force stops it.
Why does a heavier sled not always slide faster than a lighter sled?
The heavier sled has more momentum, but it also creates more friction by pressing harder on the snow
Which needs more force to move: a backpack full of books or an empty backpack? Why?
The full backpack because it has more mass.
What would happen to us if there were no gravity on Earth?
We would float away into space!
Why do athletes wear shoes with special soles during sports?
To create the right amount of friction for grip and safety.
Which moves farther: a ball on a smooth gym floor or a ball on grass, and why?
The ball on the smooth floor because there is less friction.
Explain how gravity and friction work when a basketball player dribbles a ball.
Gravity pulls the ball down, and friction with the court helps the ball bounce and stop.
If two objects have the same size but different masses, which one is harder to push and why?
The object with more mass because it requires more force to move.