Gravity
Do heavy things fall faster than light things?
No, without air, all things fall at the same speed.
What is friction?
Friction is a force that resists motion when two surfaces rub together.
What is air resistance?
Air resistance is a force that pushes against moving objects through the air.
What is tension?
Tension is a force that pulls on something like a rope or string.
What type of force is the push or pull you apply when moving an object?
It is called an applied force.
Does a heavier object feel more pull from Earth than a lighter one?
Yes, heavier objects feel a stronger pull.
Does friction make it easier or harder to move things?
Friction makes it harder to move things.
Does air resistance help or slow down objects moving through air?
Air resistance slows down objects.
Where do you find tension forces?
Tension happens in ropes, cables, or strings when they are pulled tight.
What force acts to stop things from sliding past each other?
That’s friction.
Why do astronauts feel like they are floating in space?
Because they are falling around the Earth and feel weightless.
What happens to friction if the surfaces are rougher?
Friction becomes stronger with rougher surfaces.
What kind of shapes experience less air resistance?
Smooth and streamlined shapes experience less air resistance.
If you pull both ends of a rope, what happens to the tension in the rope?
The tension increases as you pull harder.
Which force keeps planets orbiting around the Sun?
Gravity keeps planets in orbit.
What happens to the gravity between two things if they get farther apart?
The gravity gets weaker.
Can friction be helpful? Give one example.
Yes, friction helps us walk without slipping.
Why do parachutes help slow people down when they fall?
Parachutes increase air resistance, which slows the fall.
Can tension pull objects apart or push them together?
Tension only pulls objects apart, it does not push.
What force acts through a rope or string when it is pulled tight?
That force is called tension.
What does gravity do between two objects?
Gravity pulls the two objects toward each other.
How can we reduce friction?
By making surfaces smoother or using lubricants like oil.
What happens to air resistance when an object moves faster?
Air resistance increases as the object moves faster.
What happens to the tension in a rope holding a hanging object?
The tension balances the weight of the hanging object.
What force opposes the motion of objects moving through air?
Air resistance opposes motion through air.