Forces and motion

Force
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Terms in this set (24)
Force
A push or a pull
Acceleration
The rate at which velocity changes. It is occurs when an object speeds up, slows down, or changes direction
The 3 effects of forces acting on an object
Change shape; change speed; or change direction.
Resultant force
The single force that totals the effect of all the forces acting on an object
Velocity or speed
The rate at which an object travels a distance
Air resistance
A force that opposes the motion of objects that move through the air
Image: Air resistance
Friction
A force that opposes motion between two surfaces that are in contact
Image: Friction
Weight
The force of gravity pulling on an object
Image: Weight
Water resistance
A force that opposes the motion of objects that move through water
Image: Water resistance
Upthrust
A force that pushes things up in liquids and gases, and off solid surfaces
Image: Upthrust
ThrustA push force exerted by the engine of an aircraft or rocketMagnetismThe force of attraction or repulsion of magnetic materialsElectrostatic forceThe force between electrically charged objectsTensionA force that pulls on or stretches an objectCompressionA force that pushes on or squeezes an objectNewton meterA spring balance used to measure force.Newton (N)The unit of measurement of forceMetres per second (m/s)The unit of measurement of velocityMetres per second per second (m/s/s)The unit of measurement of accelerationMetres (m)The unit of measurement of distanceSeconds (s)The unit of measurement of timeKilograms (kg)The unit of measurement of massBalanced forcesWhen this happens: a moving object maintains a constant speed; and a stationary object remains stationaryUnbalanced forcesWhen this happens: an object will accelerate in a new direction