PHYSICS

GRAPHICAL ANALYSIS SKILLS

enjoy learning physics ALINA IMAN ARIF

PLOTTING GRAPH

TITTLE OF THE GRAPH: symbol of the variable

GRAPH AXIS: symbol and unit (x-axis and y-axis)

y-axis : Responding variable

x-axis : Manipulated variable

SCALE: uniform scale example: 0, 2, 5, 10, 15 etc

SIZE: > 50% of graph paper

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relationship based on the GRAPH Graph pattern: straight line

Y

X

Y = mX

C = 0 m (gradient) = +ve

Relationship: Y is directly proportional to X

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Y

X

Y = mX + C

C = +ve m (gradient) = +ve

Relationship: Y is increase linearly to X

C

relationship based on the GRAPH Graph pattern: straight line

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Y

X

Y = mX - C

C = -ve m (gradient) = +ve

Relationship: Y is increase linearly to X

C

relationship based on the GRAPH Graph pattern: straight line

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Y

X

Y = -mX + C

C = +ve m (gradient) = -ve

Relationship: Y is decrease linearly to X

C

relationship based on the GRAPH Graph pattern: straight line

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Y

1/X

Y = m(1/X)

C = 0 m (gradient) = +ve

Relationship: Y is directly proportional to 1/X

relationship based on the GRAPH Graph pattern: straight line

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F/N

gradient of the graph

extension, x/cm

∆y

∆x

MUST show the substitution and unit (based on the graph given-refer to the variable)

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F/N

gradient of the graph

extension, x/cm

∆y

∆x

the idea to find the unit of the gradient

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F/N

precaution

extension, x/cm

Identify the variable F = force x = extension of the spring

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Identify the measuring instrument based on the variable given F = using SPRING BALANCE x = using METER RULE

F/N

precaution

extension, x/cm

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Eye must be perpendicular to the

reading of the (instrument) to avoid

parallax error.instrument : refer to the graph (y and x axis)