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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

balanced force

forces that act against each other and do not cause a change in motion

contact force

a force that requires tow pieces of matter to touch

data

the information from which a conclusion can be drawn or a prediction can be made

direct evidence


evidence that comes from your measurements, tests, or observations

direction

a course along which someone or something moves

exert

to put forth (as strength); to put into use;



Example: I exerted all my strength to move the box.

force

a push or pull that can change the position and/or motion of an object/material

friction

the force that acts in an opposite direction to movement

gravity

the force that pulls objects toward each other

indirect evidence

evidence based on an inference

inclined plane

a simple machine made of a flat, sloping surface (example: a ramp)

inertia

the tendency of an object to resist a change in motion

investigation

The search for an answer to a question

kinetic energy

energy due to motion

magnetism

a force that pulls a magnetic material across a distance

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.

motion

a change in the position of an object

non-contact force

a force that acts at a distance

potential energy

energy that is not causing any changes now but could cause changes in the future

position

the place where something is located; where something has been put

procedure

step-by-step instructions for completing a task

push

the act of applying force in order to move something away

pull

the act of applying force to move something toward or with you

shape

the external form or appearance characteristic of someone or something; the outline of an area or figure

speed

the distance an object moves per unit of time, such as miles per hour

trial

a repeat of an observation or test

unbalanced force

forces that are unequal in size or direction and that change an object's motion

variable

something that can change in a test

velocity

the speed and direction an object is moving

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)