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18 Cards in this Set
- Front
- Back
- 3rd side (hint)
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lesson 1 /force
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an influence tending to change motion of an object or produce motion in a object
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contact force
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a force exerted only when objects are touching
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noncontact force
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a force exerted when objects are not touching
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net force
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the combination of all the forces acting on an object
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unbalanced forces
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forces that combine to form a net force that is not zero
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balanced forces
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forces that combine to form a net force of zero
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Newton's first law of motion
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if an net force on an object is zero,an object at rest remains at rest, or, if the object is moving,it continues to move in a straight line with constant speed
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lesson 2/ gravity
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an attractive force between all objects that have mass
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law of universal gravitation
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all objects are attracted to each other with a force that depends on their masses and the distance between the objects
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weight
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the gravitational force exerted on an object
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friction
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a contact force that opposes the movement between two surfaces in contact
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elastic force
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force exerted by a material when it is stretched or compressed
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tension force
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pulling force applied to an object that can make an object strech
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compression force
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a squeezing force applied to an object that can make an object shrink
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normal force
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a force exerted by an object perpendicular to the surface mining an object
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lesson 3/ centripental force
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in circular motion a force that acts perpendicular to the direction of motion toward of the circle
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Newton's 2nd and 3rd laws of motion
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third law of motion hint pic
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c
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