8.1 Lesson 3 : Deformation

What happens to solid objects when contact forces are applied to them?

• Solid objects remain unchanged when contact forces are applied to them.

• Solid objects can bend and undergo deformation or breakage when contact forces are applied.

True or False: All solid objects remain unchanged when pushed in a collision.

• Sometimes

• False

• True

• Only if they are small objects

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Emma, Nora, and Ava are conducting an experiment in their physics class. They are trying to understand what causes the deformation of solids. They have a few theories. Which one do you think is correct?

• Applying contact forces on the solid

• Changing the gravitational pull on the solid

• Inducing chemical reactions in the solid

• Altering the temperature of the solid

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During a science experiment, Luna, Sophia, and James applied contact forces to a solid rubber ball. Why did the rubber ball bend or change shape when they applied these forces?

• The rubber ball became softer and more malleable when Luna, Sophia, and James applied contact forces.

• The movement or rearrangement of particles within the rubber ball caused it to change shape.

• The rubber ball's molecules became more tightly packed together when Luna, Sophia, and James applied contact forces.

• The rubber ball's surface became rougher and more uneven when Luna, Sophia, and James applied contact forces.

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Organize these options into the right categories

Groups:

(a) Changing Shape

,

(b) Changing Motion

• deformation

• direction

• speed

• material "wave"

• bend

• stop

• slow down

• compression

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What We Know :​ (a)   solid objects ​ (b)   or change ​ (c)   when pushed in a collision and when other ​ (d)   ​ (e)   are applied to them.

• all
• bend
• shape
• contact
• forces

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4.0 Level Question : Draw two objects colliding. Your model should include what the change in shape looks like at the moment of greatest impact.

_{If You are not attempting, draw an X.}

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