Vocabulary
What is a free body diagram?
A free body diagram is a picture that summarizes all the forces acting on that object. It shows the type of force and direction.
Describe Spring force.
Spring force is the force exerted by a compressed or streched spring.
Describe Normal Force
Upward force on an object on a stable surface
What is a balanced force?
In a balanced force, the forces cancel each other out so that the object continues to do what it has been doing. The Net Force is 0.
What is Net force?
Forces are either balanced or unbalanced. When forces on an object are equal and opposite, the net force is 0, and the motion doesn't change. Force is measured in N.
Describe interacting forces.
Forces typically act in pairs. When 2 forces act in the same direction, the add together. When 2 forces act in opposite directions, the subtract from one another.
What is Applied Force?
Applied force is the force applied to an object by a person or other object.
Describe buoyancy.
The upward force on an object placed in a fluid.
What is an unbalanced force?
In an unbalanced force, the forces do not cancel each other out, which causes the object to move at different speeds.
Describe Static Friction.
It occurs between 2 objects that aren't moving.
What are Forces?
Forces can be balanced or unbalanced. They are vector quantities that can be described as a push or pull. They can affect objects in 3 ways: change in speed, change in direction, or change in shape.
What is the gravitational force?
Gravity is the force of attraction between all objects.
Describe air resistance.
Type of friction on objects traveling through air.
What is Newton's Second Law of Motion?
Force = Mass x Acceleration (F=ma).
Describe Fluid Friction.
Fluid friction occurs when an object moves through a fluid (air or gas/liquid). It is also called air resistance.
What is Dynamics?
Dynamics is the study of how forces affect the motion of objects and systems. It considers the causes of motion, unlike kinematics.
What is magnetism force?
the force of attraction between magnetic fields.
Describe friction.
Force that resists motion of an object.
What is Newton's first law of motion?
"An object in motion will stay in motion and an object at rest will stay at rest unless acted upon by an unbalanced force." - Sir Isaac Newton (1643-1727)
This is also called the law of inertia.
What is sliding friction?
Sliding friction occurs when an object slides over a surface (EX ice skating).
What is Inertia?
Inertia is the property of matter that resists a change in direction or motion unless acted upon by an unbalanced force.
More mass=more inertia
Less mass=less inertia.
What is the electric force?
The force of attraction betweem (+) and (-) charges.
Describe tension.
Tension is the force transmitted by pulled strings, ropess, etc.
What is Newton's 3rd law of motion?
Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction.
Describe rolling friction.
Rolling friction occurs when an object rolls over a surface (EX biking).