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Newton's First Law of Motion

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