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Motion and Forces (Gravity, Friction, and Pressure (Pressure depends on…
Motion and Forces
Gravity, Friction, and Pressure
Pressure depends on force and area
Fluids can exert a force on objects
Friction is a force that opposes motion
Gravity is a force exerted by masses
Forces
Force and mass determine acceleration
Forces act in pairs
Forces change motion
Forces transfer momentum
Motion
Acceleration measures how fast velocity changes
Speed measures how fast position changes
An object in motion changes position
Work and Energy
Energy is transferred when work is done
Power is the rate at which work is done
Work is the use of force to move an object
Machines
Six simple machines have many uses
Modern technology uses compound machines
Machines help people do work