Vocabulary
A force is____
A push or a pull
True or False
When forces are balanced an object is at rest.
True
True or False
slipping on ice is caused by too much friction
false
True or False
Magnets are attracted to all metal
False
Gravity is ____
The force that pulls object towards Earth
What happens when you give an object a push?
It moves away
You can reduce friction by using a _____________.
lubricant
opposite poles ____
attract each other
Repel means ____
To push away
How can you show the direction of a force in a drawing?
By using arrows to show the motion of the direction
Friction can be harmful because_____
friction causes heat that can wear down engine parts over time
Magnetism is a force that ___________
acts across a distance
Predict means____
to say something is about to happen
_____, ______, and ____ or ____ are types of forces
gravity, magnetism, and pushes or pulls
What is an example of helpful friction?
The tread on tires increases the friction with the surface of the road.
Maglev trains use magnetism to ______
float above the tracks
Motion means _____
the process of an object changing position
Friction happens when two objects are ___________.
in contact
How is motion affected by force?
The harder the push or the pull the faster an object will move
The needle in a compass is attracted to ______
the Earth's magnetic field