IBDP Physics - A. Space, Time & Motion (copy)

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23 Terms

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Distance

How far traveled in any direction measured in meters (m)

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Speed

How fast traveled in any direction measured in meters per second (ms^-1)

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Instantaneous speed

The speed at a specific distance measured in meters per second (ms^-1)

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Average speed

The speed over a total distance measured in meters per second (ms^-1)

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Displacement

Distance in a specific direction measured in meters (m)

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Velocity

Speed in a specific direction measured in meters per second (ms^-1)

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Acceleration

Change in speed over time measured in meters per second squared (ms^-2)

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Vectors

Measurements with magnitude and direction

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Scalars

Measurements with only magnitude

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Equations of Uniform Motion (SUVAT)

Set of kinematic equations describing motion with constant acceleration

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Projectile Motion

Motion involving two components - vertical and horizontal

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Contact Forces

Forces acting between objects physically touching

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Non-Contact Forces

Forces acting at a distance without physical contact

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Hooke’s Law

Extension of material is proportional to applied force

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Stoke’s Law

Frictional force between an object and a fluid

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Archimedes Principle

Buoyancy force experienced by a body in a fluid

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Conservation of Linear Momentum

Total linear momentum before = total linear momentum after a collision

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Impulse and Momentum

Impulse is change in momentum of a system

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Force and Momentum

Resultant force is the rate of change of momentum

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Collisions and Explosions

Momentum is conserved, kinetic energy may not be

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Angular Velocity

Speed of an object moving in a circle

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Centripetal Force

Force required to keep a body in uniform circular motion

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Centripetal Acceleration

Acceleration towards the center of a circle when in motion