Materials

A constraint describes the EFFECT of external ______ on a material.

Cindy unscrews the lid on the peanut butter jar and spreads some peanut butter on her toast with a knife.

Identify the type of constraint the LID is subjected to:

• Torsion

• Deflection

• Compression

• Tension

• Shearing

Cindy unscrews the lid on the peanut butter jar and spreads some peanut butter on her toast with a knife.

Identify the type of constraint the KNIFE is subjected to:

• Torsion

• Deflection

• Compression

• Tension

• Shearing

She pushes down so hard with her knife that she crushes her toast a bit. Then she pulls on the little chain on the table lamp to get enough light to read the newspaper.

Identify the type of constraint the TOAST is subjected to:

• Torsion

• Deflection

• Compression

• Tension

• Shearing

She pushes down so hard with her knife that she crushes her toast a bit. Then she pulls on the little chain on the table lamp to get enough light to read the newspaper.

Identify the type of constraint the CHAIN is subjected to:

• Torsion

• Deflection

• Compression

• Tension

• Shearing

Finally, she cuts out a newspaper article about summer camp jobs to show her classmates when she gets to school.

Identify the type of constraint the NEWSPAPER is subjected to:

• Torsion

• Deflection

• Compression

• Tension

• Shearing

Circle the property that would be the most useful in the required material:

"A bumper protects a car in the event of a collision."

• Resilience

• Thermal conductivity

• Electrical conductivity

• Stiffness

"A material for manufacturing gutters must be able to bend without breaking."

• Resilience

• Malleability

• Hardness

• Stiffness

"A material for making pots and pans must keep energy loss to a minimum."

• Malleability

• Ductility

• Elasticity

• Thermal conductivity

To make specialized skis for freestyle skiers, a material must be able to recover its original shape even after bending between two moguls.

• Resilience

• Ductility

• Elasticity

• Malleability