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Forces and Motion


position the location of an object
motion a change in position
force a push or pull; a force can make an object move
work what is done when a force moves an object or changes an object's motion
distance is the amount of space between two objects or places
speed describes how quickly an object moves
gravity is a pulling force between two objects, such as you and Earth
friction a force that helps stop the motion of an object
Kinetic energy energy in motion
Potential energy energy at rest
In order to measure speed you need to know how far an object traveled and how long it took to go there.
Under, left, and right are used to describe an object's position
If the Sun is directly overhead at noon your shadow is shorter
Sandpaper, rough stones, and rubber increase friction
Energy makes changes in motion possible
Work is done when a force changes an object's motion
How does the Sun appear to move across the sky? The Earth rotates on its axis, so the Sun is at different positions during the day.
Explain why hitting a ball is work? In order for work to be done, an object needs to move. So, if a ball is hit, the ball moves. Therefore, work is being done.
Created by: kristinfritz