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15 Cards in this Set

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What are the three types of friction
rolling friction, static friction, sliding friction
What is Newton's First Law of Motion?
If there is no net force acting on an object the object remains at rest, or if the object is already moving, it continues to move in a straight line with constant speed
What is Newton's Second Law of Motion
an object acted upon by a force will accelerate in the direction of the force.
How do we define weight in science?
It is the gravitational force between you and Earth
What is Newton's Third Law of Motion?
Forces always act in equal but opposite pairs. For every action there is an equal and opposite reaction.
List the six simple machines
inclined plane, wedge, screw, lever, wheel and axle, and pulley
A force is a _______ or a________
push, pull
What is net force
the combination of all the forces acting on an object
What two things have to happen for work to be done?
1) must apply a force to an object
2) Object must move in the same direction as you applied the force
What is power?
How quickly work is done
What is mechnical advantage?
The number of times the input force is multiplied by a machine
What is the equation for mechanical advantage?
MA = output force
input force
What is a simple machine?
A machine that does work with only one movement
Define instantaneous speed
The speed of an object at one instant of time
Define mass
The amount of matter or space an object takes up