Science Terms-Ch. 5
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equals distance traveled divided by the time it takes to travel that distance
the speed of an object and the direction of motion; changes when speed changes
occurs when an object speeds up, slows down or changes direction
a set of rules developed by Isaac Newton to explain how forces affect the motion of an object
Newton's laws of motion
a force between two surfaces in contact that resists the motion of the surfaces past each other.
the tendency to resist a change in motion
--pushing the wheelchair in a straight line and then trying to change the the direction of motion (turn)
is done when an applied force causes an object to move in the direction of the force
---picking up a box
a device thta makes work easier with only one movement: include the wedge, screw, lever, wheel and axle, pulley and inclined plane
of simple machines
Ex. can opener
the number of times the applied force is increased by a machine is called the ________
an object, like a wheel
, that has a groove with a rope or cable running through
It changes the direction of the input force
a rod or plank that pivots
about a fixed point.
The point is called the fulcrum
a sloped surface, sometimes called a ramp
It allows you to lift a heavy load by using less force over a greater distance
---Moving a couch from the ground into a trunk bed
What would you like to do?
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