Show:
Balanced & Unbalanced
Vocabulary
Forces
Net Force
Work and Power
100
These are equal in size and opposite in direction.
What are balanced forces?
100
A force that opposes motion when two surfaces rub against each other.
What is friction?
100
Gravity, Friction, and Magnetism are examples of these.
What are everyday forces?
100
Adding or subtracting individual forces gives a combined force called this.
What is a net force?
100
The use of a force to move an object.
What is work?
200
When one force is greater than its opposite force.
What are unbalanced forces?
200
The force of attraction between magnets and magnetic objects.
What is magnetism?
200
This force causes an apple to fall from a tree.
What is gravity?
200
You do this to calculate net force if two forces act on an object in the same direction.
What is add them together?
200
A joule.
What is a metric unit for measuring work?
300
This is one of the basic laws of science.
What is forces always act in pairs?
300
Any push or pull that causes an object to move, stop, change speed or direction.
What is a force?
300
This force slows a bike when the brakes are applied.
What is friction?
300
You do calculate net force by doing this if two forces act on an object in opposite directions.
What is subtract the smaller force from the larger force?
300
Force x Distance = Work
What is how work is calculated?
400
Pushing open a door is an example of this.
What is an unbalanced force?
400
The use of a force to move an object through a distance.
What is work?
400
Every magnet as two of these.
What are poles?
400
The direction a net force will act if two unbalanced forces act on an object in opposite directions.
What is in the direction of the larger force?
400
Lever, wedge, inclined plane, wheel and axle, screw, and pulley.
What are simple machines?
500
When you catch a ball, you are demonstrating this.
What is an unbalanced force?
500
The amount of work done for each unit of time.
What is power?
500
The strength of gravitation between two objects depends on these two things.
What are distance and mass?
500
The net force when a force of 100 newtons pushes against a force of friction of 80 newtons.
What is 20 newtons?
500
A shovel is an example of this.
What is a compound machine?