# Claim-Evidence-Reasoning: Shoe Bottoms

Discipline: Physics
Standards:

Science and Engineering Practices. Analyze data using tools, technologies, and/or models (e.g., computational, mathematical)in order to make valid and reliable scientific claims or determine an optimal design solution. (HS-PS2-1)

• Theories and laws provide explanations in science. (HS-PS2-1)
• Laws are statements/descriptions of the relationships among observable phenomena.(HS-PS2-1)
• Connections to Nature of Science

Disciplinary Core Ideas. PS2.A: Forces and Motion. Newton’s second law accurately predicts changes in the motion of macroscopic objects. (HS-PS2-1)
Crosscutting Concepts. Cause and Effect. Empirical evidence is required to differentiate between cause and correlation and make claims about specific causes and effects. (HS-PS2-1)

You are designing a new pair of all-purpose shoe soles for a client. You have never made shoes before, so let’s start at square-one.

You and your friends are talking about physics class during lunch (obviously…) and your friend says, “yeah, well since both horizontal and vertical forces are balanced in the free body diagram the object can’t be moving!…” How would you respond?

And then, out of nowhere your friends says, “…well, you see, a plane accelerates forward because of the net force provided by the engines, but when you accelerate forward while walking there is no net force…” Again, how would you respond?

Ask your students these questions and more with this free physics activity plan

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