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s8p3.a
demonstrate the relationship between velocity and acceleration
Term | Definition |
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force | a push or pull exerted on an object in order to change the motion of the object force has size and direction |
motion | an objects change in position relative to a reference point |
reference point | a stationary object that is used to describe an objects motion |
speed | the distance traveled divided by the time intervals during which the motion occurred |
velocity | the speed of an object in a particular direction |
acceleration | the rate at which velocity changes over time an object accelerates if its speed,direction or both changes |
friction | a force that oppose motion between two surfaces that are in contact |
net force | a force that oppose motion between two surfaces that are in contact |
balanced force | stated when the net forces acting on an object equal zero |
unbalanced force | stated when the net forces acting on an object is not zero |
inertia | the tendency of an object to resist being moved or if the object is moving th resist a change in speed or direction until and outside force acts on the object |
gravity | a force of attraction between objects that is due to their masses |
work | the transfer of energy to an object by using a force that causes the object to move in the direct of the force |
machine | a device that helps do work either by overcoming a force or changing the direction of the applied force |
inclined plane | a simple machine that straight ,slanted surface which facilitates the raising of loads a ramo |
wedge | a simple machine that is made uo of two inclined planes and that moves often used for cutting |
screw | a simple machine that consist of an inclined plane wrapped around a cylinder |
pulley | a simple machine that consist of a wheel over which a rope chair or wire passes |
lever | a simple machine that consist of a bar that pivots at a fixed point called a fulcrum |
wheel and axle |