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vocab for science
Term | Definition |
---|---|
Force | a push or pull exerted on an object in order to change the motion of the of the;force has size and direction |
Motion | an object's change in position relative to a reference point |
Reference point | a stationary object that is used to descibe an object's motion |
Speed | the distance traveled divided by the time interval during which the motion occurred |
Velocity | the speed of an object in a particular direction |
acceleration | the rate at which velocity changes over the;an object accelerates if its speed,direction,or both changes |
Friction | a force that opposes motion between two surfaces that are in combat |
Net Force | the combination of all of the acting on an object equal zero |
Blance Force | stated when the net forces acting on an object equal zero |
Unbalanced force | stated when the net force acting on an objects is not zero |
Inertia | the tendency of an object's to |
Gravity | a force of attraction between objects that is due to their mass |
Work | the transfer of energy to an object by using a force that causes the objects to move in the direction of the force |
Machine | a device that helps do works either by overcoming a force or changing the direction of applied force |
Inclined plane | a simple machine that is a straight,slanted surface,which facilitates the raising of loads;a ramp |
Wedge | a simple machine that is made up of two inclined plane wrapped moves;often used for cutting |
Screw | a simple machine that consists of an inclined plane wrapped around a cylinder |
Lever | a simple machine that consists of a bar that pivots at a fixed point called fulcrum |
Pulley | a simple machine that consists of a wheel over which a rope, chair,or wire passes |
Wheel and axle | a simple machine consisting of two circular objects of different sizes;the wheel is the large of the two circular objects |