Forces
What is a force?
A push or a pull.
What are forces that touch things called?
Contact forces.
What does a balanced force have none of?
Balanced forces have no movement.
What is motion?
Motion is what happens when an object's position changes.
What force pulls things down toward Earth?
Gravity.
Forces can do what two things to motion?
Start motion and stop motion.
What are forces that work but do not touch anything called?
Non-contact forces.
What do unbalanced forces have?
Unbalanced forces have movement.
What can motion be described by (because it follows rules, like gravity and friction)?
Patterns! For example, push and pull.
What force slows things down?
Friction.
How can forces change the speed of an object?
Forces can speed things up or slow things down.
Name one of the two contact forces we learned about.
Tension force OR spring force.
What is the net force of a balanced force?
Zero! No movement.
What is the way something faces called?
Direction.
What do magnets with the same charge do?
Repel.
What is the word for applying a force?
Exert.
Name one of the three non-contact forces we learned about.
Gravity OR magnetism OR electricity.
What is the net force of an unbalanced force?
More than zero! There is movement.
What is where something is called?
Position.
What do magnets with the opposite charge do?
Attract.
Can forces work together?
Yes, forces can work together or against each other.
What is the name of the force that has force because it has been stretched or squeezed?
Spring force.
What do equal forces cause?
No movement.
When many forces act on an object from different directions, what can be hard to do?
It can be hard to predict motion.
What is force measured in?
Newtons.