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unit lessons 4,1,and2

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
Friction   is a force that resist the movement of one surface past another  
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Gravity   is the force of attraction that exist between any two objects  
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force   is a push or pull that acts on an object  
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speed   the distance and objects that moves in an given time  
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Inertia   the tenacity for an object to remain at rest or in motion  
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weight   is the force caused by the gravitational attraction of the earth  
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velocity   a change in the speed of direction of an moving object  
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energy   the ability to cause motion to change  
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acceleration   is produced when a force acts on a mass. the greater the mass of the object being accelerated the greater the amount of force needed to accelrate the objects  
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motion   the action or process of moving or of changing place or movememnt  
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drag   to draw with force effort or difficulty pull heavily or slowly along haul trail  
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work   exertion or effort directed to produce of accomplish something labor toil  
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mass   a body of coherent matter usually of indefinite shape and often of considerable size  
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momentum   force or speed of movement  
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presure pressure   the exertain of force  
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direction   the line of which anything lies  
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