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Lesson 7: Collisions (Energy, Machines & Motion)
Vocabulary for Smithsonian STC-MS Energy, Forces and Motion Unit
Terms in this set (19)
The rate at which an object changes speed or direction.
An event in which one object exerts a force on another over a relatively short time.
Conservation of Energy
Energy cannot be created or destroyed. Energy can be transferred or transformed, but the total amount of energy remains the same.
Conservation of Momentum
A labeled drawing that explains or shows the parts of something. A diagram can be a type of model.
A movement of energy from one object or system to another.
A change in energy from one type to another, for example, a change from electrical energy to kinetic energy.
A push or a pull between objects.
A force that opposes the motion of an object.
A labeled drawing that presents mathematical information in visual form (e.g. a chart or graph). A graphical representation can be a type of model.
An object's tendency to resist change in motion.
Energy associated with moving objects.
The measure of the amount of matter in a body. The mass of a body determines how much it will accelerate when unbalanced forces act on it and how much it weighs at Earth's surface. In the metric system, mass is measured in kilograms or grams.
The product of mass and velocity.
Newton's First Law
If the forces on an object are balanced, the object will stay at rest or continue moving in the same direction at the same speed. If the forces on an object are not balanced, the net force will increase the object's speed, decrease its speed and/or change its direction of motion.
Newton's Second Law
The acceleration of an object is equal to the net force on the object divided by the object's mass.
Newton's Third Law
When one object pushes on another, the second object pushes back on the first with an equal and oppositely directed force.
Stored energy that can be released; includes chemical, electrical, gravitational, and nuclear energy.
A group of objects that function together as one unit; also, the set of related objects under study or consideration.
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