SPEED + ACCELERATION

SPEED + ACCELERATION

SPEED = DISTANCE/TIME TAKEN

• v=d/t
• Speed = distance / time taken
• v is measured in m/s or ms(to the power of)-1
• d is measured in m
• t is measured in s
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DISTANCE - TIME GRAPH

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• Steeper the line, greater the speed.
• Uniform speed. But greater speed among the three lines.
• Uniform moderate speed.
• Uniform least speed.

ACCELERATION

• An object is traveling with increasing speed.
• Accelerating = change in speed / time taken
• a = Δv / Δt
• a is measured in ms(to the power of)-2 or m/s(to the power of)2
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ACCELERATION PT 2

• Initial speed = 50m/s
• Final speed = 70m/s
• Time taken = 10s
• a = change in speed / time taken
• a = final speed - initial speed / time taken
• a = 70-50 / 10
• a = 20/10
• a = 2ms(to the power of)-2

SPEED - TIME GRAPH

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• Constant speed or no acceleration

SPEED - TIME GRAPH PT 2

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• Object is accelerating (constant)

SPEED - TIME GRAPH PT 3

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• Object is decelerating (constant)

SPEED - TIME GRAPH PT 4

• The slope of a v-t graph gives the acceleration of the graph.
• Area under the speed - time graph (vt = distance) gives the distance. (rectangle = length x width and triangle = 1/2base x height).
• (can split in half and add 1 area + 2 area)
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