Principles of Force and Motion
Everything to know about force and motion for the PSSA's!!
May the FORCE be with you! Learn about Force and Motion!!!
You are always in motion and so is the world around you. Scientists study different types of motion all around the world.
Describing Motion
Motion is when something changes position. you are always changing position but sometimes it doesn't seem like it to other people.
Types of Motion
Objects can move in many different ways and forms (like side to side like a metronome and back and forth like a swing).
How force affects motion
A force is a push or a pull. Forces can change the motion of an object. For example gravity pulls your body down when you jump. When 2 things rub together, that is called friction. Friction acts against objects.
Check out the video below for an example of how forces can change the motion of an object.
IMG_0364
Vocabulary Words you should know
Motion
Motion is a change in position.
Position
The position of an object is its location.
Force
A force is a push or a pull.
Friction
Friction is a force that acts between two surfaces that rub against each other.
Gravity
Gravity is the force of attraction between two objects.
Balanced Forces
Balanced Forces do not change the motion of an object.
Unbalanced Forces
Unbalanced Forces change the motion of an object.
QUIZ TIME
Question 1.
Which of these always happens when a ball is in motion?
A. Moves north
B. Changes direction
C. Moves faster
D. Changes Position
A. Moves north
B. Changes direction
C. Moves faster
D. Changes Position
Question 2.
True or False?
An object in motion stops when a force is not applied.
An object in motion stops when a force is not applied.
Question 3.
A child throws a ball up and it comes down. Does it matter how high you throw a ball for it to come down?
Question 4.
If Earth had a very small mass, would gravity be stronger or weaker?