Force Basics
A push or a pull that can change the motion of an object.
Force
When two equal forces act in opposite directions, the forces are called-
Balanced Forces
This force pulls objects toward the center of the Earth.
Gravity
This force slows down or stops objects that are moving.
Friction
This object attracts iron, nickel, and cobalt.
A magnet
The unit used to measure force.
Newton
This type of force causes a change in an object's motion.
Unbalanced Froces
This is the name for the force that keeps the planets in orbit around the Sun.
Gravity
Less friction
The ends of a magnet are called
Poles
This tool is used to measure force.
A spring scale
If an object is not moving, the forces acting on it are usually
Balanced Forces
This is what happens to your weight if you travel to a planet with stronger gravity than Earth.
Your weight increases
A rough surface has
More friction
Opposite poles of two magnets do this.
Attract
This is what happens to an object when a force is applied and it starts to move.
Motion
f you push a box and it starts to slide, the forces on the box are now
Unbalanced Forces
Gravity is weaker on the Moon than on Earth. This is why astronauts can do this on the Moon.
Jump higher or farther
If you slide a book on carpet and on ice, it stops faster on which surface because of more friction?
Carpet
These are the two types of magnetic poles.
North and South
The location of the object.
Position
When two people pull on a rope with different strengths, the rope will move in the direction of the stronger force. The forces are described as
Unbalanced Forces
The strength of gravity between two objects depends on these two things.
Mass and Distance
Adding oil to a machine reduces this force.
Friction
This is what happens when you try to push the same poles of two magnets together.
Repel