Drawing

DEPCOllc

3305 Airport Drive | Pittsburg, KS 66762

Work Sheet

Activity #2: Designing Counterweights

Visualizing and Describing The Science of Totally Trebuchet

Name____________________________ Date________________________

Note: You will need to include and attach additional papers to complete this worksheet.

Sketches

Create a three-view sketch of the counterweight bucket design you choose to use. Include top,

front and right side views. You will not know the dimensions until you have calculated the

necessary amounts of counterweight material. Add dimensions later

Density of Materials SI Units (kg/m

) Imperial Units (lbs/ft

)

Concrete with medium to heavy aggregate _____________ ___________________

Granite _____________ ___________________

Oak

_____________ ___________________

Volume of Material Weighing Maximum 25,000 lbs or (11,339 kg)

This figure will be the Necessary Interior Bucket Volume.

SI Units (m

) Imperial Units (ft

)

Concrete with medium to heavy aggregate

_____________ ___________________

Cut and stacked granite _____________ ___________________

Note: Cut and stacked granite will have

voids amounting to 10% of the total granite volume.

You will need to consider this when calculating the volume.

Determine the Necessary Dimensions (Length, Width and Height) for the Interior Cubic

Shape of the Bucket.

SI Units

(meters) Imperial Units (Feet)

Concrete with medium to heavy aggregate L___W___H___ L___W___H___

Cut and stacked granite L___W___H___ L___W___H___

Visualization

Provide three-view working drawings and solid model designs of the counterweight. Provide

mathematical proof of the volume and weight of the bucket. Create your finished design and check your

volume and weight using SolidWorks’ mass properties tool.

Sample Science Curriculum