## USJ Motion and Design Vocab Words

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# USJ Motion and Design Vocab Words

 FrictionA force that resists movement between two objects that are touching.
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#### Definitions

Friction A force that resists movement between two objects that are touching.
Gravity A force of attraction between any two masses. The strength of this force is dependent on the mass of each object and their distance from one another.
Inertia The tendency of a moving object to stay in motion or a resting object to stay still.
Force A push or a pull. This is also needed to make a moving object slow down, change direction or stop moving.
Potential Energy Stored energy that can be released to become other forms of energy.
Kinetic Energy energy associated with motion
Work is only done when a force makes something move. ???? = Force X distance Work is measured in Joules.
Perpetual motion Refers to movement that goes on forever.
Distance How far something moves.
Speed A measure of how fast something is moving. How far an object can go in a certain amount of time.
energy Ability to do work.
unbalanced forces initiate and influence movement.
balanced forces When an object is at rest it is balanced.
momentum The rate of acceleration. Momentum = Mass x Velocity
acceleration is a vector quantity which is defined as the rate at which an object changes its velocity. An object is doing what if it is changing its velocity.
motion the state in which one object's distance from another is changing.
technological design The process of identifying a problem, creating a solution, evaluating the solution by testing, and then refining the design to improve performance is the essence of what?
template a set pattern, mold or form.
technological drawing Blue Print - detailed plan that you could use to recreate the same vehicle or design again.
velocity The rate of change of position.
tension a force exerted by a stretched object, such as a spring.
revolutions the spinning of a wheel. One complete spin is equal to one revolution.
air resistance The force of friction on a vehicle as it moves through the air.
propeller The blades of a propeller act as rotating wings (the blades of a propeller are in fact wings or airfoils), and produce force.
axle a bar or shaft on which a wheel turns.
drag the force that opposes the forward motion of a vehicle.
laws of motion Three laws formulated by Sir Isaac Newton, the describe how objects move in relation to the forces acting on them.
prototype an original model or design.
steps in meeting a design challenge 1. Plan
2. Build
3. Test
4. Evaluate
simple machines machine with few or no moving parts that makes it easier to do work.

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