Keith's copy of Centroid of parts

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Keith Tarnowski 5 years, 9 months ago

Created this as a copy of Centroid of parts.

Name	Status	Author	Last Modified
Centroid of parts	Ready to use	William Haynes	16/03/2021 20:49
Keith's copy of Centroid of parts	draft	Keith Tarnowski	03/06/2019 15:27

There is one other version that you do not have access to.

Question statement

Determine the coordinates of the centroids of the three shapes. Grid units are [{units}].

{geogebra_applet('xjjm7qqr',[['R_1',R1],['R_2',R2],['T_1',T1],['T_2',T2],['C_1',C1],['C_2',C2]])}

Give any introductory information the student needs.

			Name	Type	Generated Value

R1	vector	vector(9,7)
R2	vector	vector(-3,0)
T1	vector	vector(9,8)
T2	vector	vector(1,5)
C1	vector	vector(3,-7)
C2	vector	vector(6,-7)

			Name	Type	Generated Value

units	string	in
RC	vector	vector(3,3.5)
TC	vector	vector(6.3333333333,7)
CC	vector	vector(4.2732406202,-7)
debug	boolean	false

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
vector(random(-10..10),random(-8..8))

JME function reference

Description

Describe what this variable represents, and list any assumptions made about its value.

Can an exam override the value of this variable?

Generated value: `vector`

vector(9,7)

→ Used by:

Statement
Variable testing condition

Parts

Gap-fill

Gap-fill

Ask the student a question, and give any hints about how they should answer this part.

Part	$\bar{x}$	$\bar{y}$
Rectangle	Gap 0.	Gap 1.
Triangle	Gap 2.	Gap 3.
Semicircle:	Gap 4.	Gap 5.

{RC} {units}

{TC} {units}

{CC} {units}

Advice

For a rectangle, the centroid is at the geometric center.

For a right triangle, divide the base and height into thirds. The centroid is located at the intersection point nearest to the right angle.

For a semicircle, the centroid is located on the axis of symmetry, a distance of $\frac{4r}{3\pi}$ from the straight edge.

Give a worked solution to the whole question.

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Part	Test	Passed?
Gap-fill
Gap-fill		Hasn't run yet
Engineering Accuracy with units
Engineering Accuracy with units		Hasn't run yet
Engineering Accuracy with units
Engineering Accuracy with units		Hasn't run yet
Engineering Accuracy with units
Engineering Accuracy with units		Hasn't run yet
Engineering Accuracy with units
Engineering Accuracy with units		Hasn't run yet
Engineering Accuracy with units
Engineering Accuracy with units		Hasn't run yet
Engineering Accuracy with units
Engineering Accuracy with units		Hasn't run yet

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Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

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Checkpoint description

Keith Tarnowski 5 years, 9 months ago

Error in variable testing condition

Error

Warning

Generated value: `vector`

Parts

Gap-fill

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Keith's copy of Centroid of parts

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Keith Tarnowski 5 years, 9 months ago

Error in variable testing condition

Error

Warning

Generated value: vector

Parts

Gap-fill

Generated value: `vector`