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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