Collisions
This word describes what happens when two objects hit or bump into each other.
What is a collision
This word describes any change in an object’s position over time.
Answer: What is motion?
Newton’s First Law is also called the Law of ________.
Answer: What is inertia?
This term describes how fast an object is moving.
Answer: What is speed?
A force is a ______ or a ______.
Answer: What is a push or a pull?
When two objects collide, each object applies this to the other.
What is a force
When forces on an object are balanced, this happens to the object’s motion.
Answer: What is it stays the same?
Newton’s First Law says an object will keep doing this unless an unbalanced force acts on it.
Answer: What is keep its motion the same?
(or stay at rest or in constant motion)
In the unit, students learn that an object with more of this is harder to speed up or slow down.
Answer: What is mass?
This happens to an object’s motion when the forces acting on it are balanced.
Answer: What is its motion stays the same?
In a collision, this changes when the force from the other object makes it speed up, slow down, or change direction.
What is the object’s motion?
When forces on an object are unbalanced, the object will do one of these: speed up, slow down, or ________.
Answer: What is change direction?
Newton’s Second Law says the greater the force on an object, the greater the acceleration will be.
Answer: What is the acceleration?
When two objects collide, the one moving faster usually has more of this to transfer.
Answer: What is energy?
(or What is kinetic energy?)
This type of force slows objects down when they slide against a surface.
Answer: What is friction?
This describes how both objects in a collision push back on each other with the same strength but in opposite directions.
What is Newton’s Third Law?
This term describes the rate at which an object’s motion changes when a force acts on it.
Answer: What is acceleration?
Newton’s Third Law states that for every action force, there is this kind of force.
Answer: What is an equal and opposite force?
If two objects have the same speed, the one with greater mass will be harder to stop because it has more of this.
Answer: What is momentum?
The size and direction of a force are shown with these in the unit’s diagrams.
Answer: What are arrows (force vectors)?
When a faster-moving object hits a slower one, it often transfers this to the slower object.
What is energy?
In the unit’s models, the size and direction of this (shown by arrows) determine how an object’s motion will change.
Answer: What are force vectors?
According to Newton’s Second Law, an object with more of this will change its motion less when the same force is applied.
Answer: What is mass?
In the unit’s models, an object’s change in speed during a collision depends on two factors: the strength of the force and this property of the object.
Answer: What is its mass?
When two objects interact, each one feels a force from the other. The forces are equal in strength and opposite in direction. This idea comes from which of Newton’s laws?
Answer: What is Newton’s Third Law?