Newton's First Law of Motion
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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| law | a statement that describes events or relationships that exist in nature or relationships that exist in nature
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| Sir Isaac Newton | during the 1600's the English scientist ---- suggested three laws of motion
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| First Law | Newton's ---- all objects resist change in motion
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| rest | Newton's first law means that an object at ---stays at unless an unbalanced force acts on it
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| contines | Newton's first law means that an object in motion ----- moving in a straight line at a constant speed unless na unbalanced force acts on it
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| inertia | ----- the tendency of an object to resist any change in its state of motion
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| mass | the greater the ----- of an object, the more inertia the object has
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| friction | a force between surfaces that resists the movement of one surface past the other surface
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| energy | friction converts ----- of motion into thermal energy
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| helpful or harmful | friction can be ----- or -----
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| control | without friction, motion would be very difficult to control
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| moving , slow | without friction your would not be able to start ---- or if moving, ------ down
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| reduce | wheels ----- friction becasue the rolling wheel and the surface it contacts peel apart rather than scrape against each other
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| air resistance | the friction from air molecules hitting an object as the object moves through the air
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| unbalanced | an ----- force can keep an object moving in a circle
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| orbit | an example of circular motion is when the force of gravity keeps a satellite in ---- around the earth
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| gravity | without -----, a satellite would fly off in a straight line
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| Newton's 2nd Law | when a force is applied to an object it causes the object to acceleate
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| mass | force = ----- x acceleration
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| direction | an object accelerates in the ------ of the force that acts on it
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| changes | when the acceleration of an object changes, the force acting on the object also is changing
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| Galileo | the Italian scientist ----- showed that falling objects with different masses have the same acceleration.
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| air | Galeileo's observation is sture unless the objects are affected by ----- resistance
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| resistance | air ------ causes a parachute to slow down the descent of a skydiver
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| streamline | a ---- object has a shape that reduces air resistance
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| aircraft | ----- have a streamline design
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| ships, submarines | streamlining is also helpful for objects that travel through water, such as ---- and -----
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| easily | fish and marine mammals are streamlined to move through water ------
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| pairs | all forces come in pairs
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| Newton's 3rd Law | when one object exerts a force upon a second object, the second object exerts an equal and opposite force upon the first object
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| action , reaction | Newton's third law also called the law of ---- and -----
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| equal , opposite | according to 3rd: as a person walks, his foot pushes on the ground, but the ground pushes back with an ---- and ----- force
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Created by:
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