Forces
Two "p" words that describe a force
What is push or pull?
Things a design need in order to meet the purpose
What is criteria
The energy of motion
What is kinetic energy?
Newton's Third Law: Every action has an ______ and _______ reaction.
What is equal and opposite?
The variables you keep the same in an experiment
What are controlled variables
Cart A has 2 washers, and collides with Cart B with 4 washers. The peak force recorded on Cart A is 6 N. What is the peak force on Cart B?
6 N (Peak force is always equal and opposite!)
When an object deforms and does not return to its original shape
What is permanent deformation?
The stored energy in an object based on its position
Newton's Second Law: _____ = Mass x Acceleration
What is force?
The variable that is being tested in an experiment. It is manipulated or changed intentionally to see the result it has on another variable
What is the independent variable?
The force that pulls all objects towards the center of the Earth
What is gravity?
The point at which temporary deformation becomes permanent deformation
What is the breaking point?
The energy held by a roller coaster at the top of a hill before it moves
What is potential energy?
Newton's First Law states that an object at rest _____________
What is "stays at rest"? (unless acted upon by an unbalanced force)
The variable that is measured or observed in an experiment.
What is the dependent variable?
The force that works against the movement of two objects in contact with one another
What is friction?
The maximum amount of force that can be applied to an object and result in temporary deformation.
What is elastic limit?
The energy held by a soccer ball rolling across a field
What is kinetic energy?
Newton's First Law states that an object in motion _____________
What is "stays in motion"? (unless acted upon by an unbalanced force)
Miss McKenna would like to know more about how different forces, like friction, affect the speed of moving objects. What is the independent variable she should consider? What is the dependent variable?
Independent: Friction
Dependent: Speed of the objects
The force that works against the movement of an object through air molecules
What is air resistance?
When making a design there are other considerations like time, money, and available materials.
What are constraints
When you increase the speed of an object by two times, how much greater is the KE
What is 4x greater
The property of an object that follows Newton's First Law.
What is inertia?
Miss McKenna would like to know more about how different forces, like friction, affect the speed of moving objects. Set up an experiment that you would run to test this experimental question.
Use surfaces with varying amounts of friction to record the time it takes the object to travel a certain distance. The mass of the object and the force it is being pulled with should be kept the same.