Lesson 3
What happens when we push on something?
An equal or opposite force pushes back.
When mass is added to an object, how does it affect distance?
More massful object result in less distance.
When two objects collide, are the forces balanced, or unbalanced?
Unbalanced.
What do the arrow lengths represent?
Magnitude.
What is a force?
A push or a pull.
What do we use to draw forces?
Vectors.
What is needed to conduct a fair investigation?
1 of each variable: Independent; Dependent; Constant.
How does mass contribute to distance?
It reduces it.
What are vectors used for?
Measuring the magnitude of forces.
What is used to measure the strength an objects force when pushing against something?
Newtons.
What represents vector lengths?
Magnitude.
The variable that is changed in an investigation.
What will greater impact collision besides mass?
Speed.
Not only do force vectors represent magnitude, but they also represent:
Direction.
What is a force, affected by mass that pulls objects down?
Gravity.
What causes and object to be crushed?
Unbalanced forces.
What is a dependent variable?
The outcome that is recorded in the investigation.
What is a constraint?
A need.
What are vectors represented by when being drawn in a model?
Arrows.
What is friction?
A resistance on a surface.
What does it mean when an object is stable?
The net force adds up to zero.
What is a constant variable?
Everything else in the investigation.
What is criteria?
A want.
What kind of models are vectors used in?
One and two object models.
What is wind resistance?
A resistance in air, caused by wind.