Vocabulary
Force
A push or a pull.
The amount of space an object takes up.
Mass
Force
Pushing a toy car. Pulling a wagon. Picking up a rock.
Equal amount of force.
Balanced force
Acceleration
How much speed something picks up.
To move something away from you.
Push
Acceleration
A car going down the road. Running around in your yard. Comet going through the Earth's atmosphere.
One force is greater than the other.
Unbalanced force
Speed
How fast or slow an object is moving.
To move something towards you.
Pull
Speed
A car going 60 mph. You going, 5 mph. Or an object going a certain speed.
Inertia
An object in motion will stay in motion. An object at rest will stay at rest
Two objects rubbing together slowing down the object that is moving.( It makes heat.)
Friction
Inertia
You tend to move forward when a sudden break is applied.You feel a backward force when the bus moves quickly from rest.
Velocity
The speed in combination with the direction of motion of an object.
An invisible force pulling you down.
Gravity
Velocity
The speed of a car travelling north on a highway. The speed a rocket travels after launching.