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31 Cards in this Set
- Front
- Back
acceleration |
the rate at which the speed or direction of motion of an object changes over time |
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balanced force |
forces that act against each other and do not cause a change in motion |
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contact force |
a force that requires tow pieces of matter to touch |
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data |
the information from which a conclusion can be drawn or a prediction can be made |
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direct evidence
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evidence that comes from your measurements, tests, or observations |
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direction |
a course along which someone or something moves |
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exert |
to put forth (as strength); to put into use;
Example: I exerted all my strength to move the box. |
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force |
a push or pull that can change the position and/or motion of an object/material |
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friction |
the force that acts in an opposite direction to movement |
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gravity |
the force that pulls objects toward each other |
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indirect evidence |
evidence based on an inference |
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inclined plane |
a simple machine made of a flat, sloping surface (example: a ramp) |
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inertia |
the tendency of an object to resist a change in motion |
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investigation |
The search for an answer to a question |
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kinetic energy |
energy due to motion |
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magnetism |
a force that pulls a magnetic material across a distance |
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momentum |
the quantity of motion of a moving body, measured as a product of its mass and velocity
Example: Moving things have less momentum if they are light or moving slowly, and more momentum if they are heavy or moving fast. |
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motion |
a change in the position of an object |
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non-contact force |
a force that acts at a distance |
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potential energy |
energy that is not causing any changes now but could cause changes in the future |
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position |
the place where something is located; where something has been put |
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procedure |
step-by-step instructions for completing a task |
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push |
the act of applying force in order to move something away |
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pull |
the act of applying force to move something toward or with you |
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shape |
the external form or appearance characteristic of someone or something; the outline of an area or figure |
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speed |
the distance an object moves per unit of time, such as miles per hour |
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trial |
a repeat of an observation or test |
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unbalanced force |
forces that are unequal in size or direction and that change an object's motion |
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variable |
something that can change in a test |
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velocity |
the speed and direction an object is moving |
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work |
using a force to move an object a distance (when both the force and the motion of the object are in the same direction) |