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speed (physics)
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Speed (physics)
Rate at which an object moves, or how fast an object moves. The average speed v of an object may be calculated by dividing the distance s it has travelled by the time t taken to do so, and may be expressed as:
The usual units of speed are metres per second or kilometres per hour.
Speed is a scalar quantity in which direction of motion is unimportant (unlike the vector quantity velocity, in which both magnitude and direction must be taken into consideration). Movement can be described by using motion graphs. Plotting distance against time in a distance–time graph allows the total distance covered to be worked out. See also speed–time graph.
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acceleration
accuracy
air resistance
area
balanced forces
bearing (navigation)
Boyle's law
circumference
construction
conversion graph
density
distance
distance–time graph
elasticity (physics)
error
force
friction
gravity
grid reference
Hooke's law
imperial system
length
mass (physics)
metric system
moment of a force
motion
newton
Newton's laws of motion
perimeter
pressure
resultant force
scalar quantity
scale (mathematics)
significant figures
speed (physics)
speed–time graph
stopping distance
streamlining (technology)
terminal velocity
time (science)
turning effect of a force
vector quantity
velocity
volume
weight
accuracy
air resistance
area
balanced forces
bearing (navigation)
Boyle's law
circumference
construction
conversion graph
density
distance
distance–time graph
elasticity (physics)
error
force
friction
gravity
grid reference
Hooke's law
imperial system
length
mass (physics)
metric system
moment of a force
motion
newton
Newton's laws of motion
perimeter
pressure
resultant force
scalar quantity
scale (mathematics)
significant figures
speed (physics)
speed–time graph
stopping distance
streamlining (technology)
terminal velocity
time (science)
turning effect of a force
vector quantity
velocity
volume
weight
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