A
A force that makes something can be a ________ or a ____________.
Push or a pull
Force
The Ability to work or cause change is called_________
Energy
The act of moving or changing position is called_________
Motion
A measure of how fast something moves over a certain distance is called ___________.
Speed
Work
A force that slows or stops motion when two things rub against each other is called _________________.
Friction
When two equal forces act in opposite directions, the result is that the forces are equal and there is no motion.
Balanced Force
When one force is stronger than the other, the result is motion. What type of force is this?
Unbalanced force
A force that attracts objects toward the Earth is called _______
Gravity
Give an example of an unbalanced force.
when one force is stronger than the other, the result is motion.
Describe what non-contact forces are
Non-contact forces are forces that do not touch the object to make it move.
Name three ways that forces can make objects move.
They can cause objects to start moving, speed up, slow down, or stop moving.
Give an example of a balanced force.
anything that has equal forces pulling, no motion will occur
If you apply the same force to an object with more mass, the object moves a _______________ distance.
Shorter
Does weight affect an objects motion?
YES! It is easier to put an object in motion if it is lighter. It requires more force to move a heavier object
Explain contact forces
Contact forces happen between objects that touch. (A baseball bat makes contact with the baseball and causes the baseball to change directions).
Explain balanced and unbalanced forces.
Balanced Forces have no motion. Unbalanced forces causes motion. Think about the dogs pulling on the rope.
Name two non-contact forces
gravity and magnetism
Is work being done if movement doesn't occur?
No. Work only happens if movement happens.