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Scientific Problem Solving

Scientific Problem Solving. The 4 Step Method. Objective. The learner will be able to describe the purpose and requirements for each of the 4 main steps in the technique for problem solving. Overview. Step 1: “Show What You Know” Step 2: “Isolate” Step 3: “Plug-n-Play” Step 4: “Solve”

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Scientific Problem Solving

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  1. Scientific Problem Solving The 4 Step Method

  2. Objective • The learner will be able to describe the purpose and requirements for each of the 4 main steps in the technique for problem solving.

  3. Overview • Step 1: “Show What You Know” • Step 2: “Isolate” • Step 3: “Plug-n-Play” • Step 4: “Solve” • Review • Sample 1 • Sample 2

  4. Step 1: “Show What You Know” • List relevant given information

  5. Step 1: “Show What You Know” • List relevant given information • Always Include Proper Units

  6. Step 1: “Show What You Know” • List relevant given information • Always Include Proper Units • Identify what must be found

  7. Step 2: “Isolate” • Fundamental Equation

  8. Step 2: “Isolate” • Fundamental Equation • Rearrange or isolate

  9. Step 3: “Plug-n-Play” • Insert Values

  10. Step 4: “Solve” • Calculate

  11. Step 4: “Solve” • Calculate • Scientific Value

  12. Step 4: “Solve” • Calculate • Scientific Value • Highlight

  13. Review • Step 1: Show what you know • Step 2: Isolate • Step 3: Plug-n-Play • Step 4: Solve

  14. Sample 1 • A person runs 800.0 m in 3.5 minutes, what was their speed?

  15. Sample 1 • A person runs 800.0 m in 3.5 minutes, what was their speed? • Step 1: • d = 800.0 m • t = 2.5 min • v = ?

  16. Sample 1 • A person runs 800.0 m in 3.5 minutes, what was their speed? • Step 1: • d = 800.0 m • t = 2.5 min Convert to seconds • v = ?

  17. Sample 1 • A person runs 800.0 m in 3.5 minutes, what was their speed? • Step 1: • d = 800.0 m • t = 3.5 min x 60 s/min = 210 s • v = ?

  18. Sample 1 • A person runs 800.0 m in 3.5 minutes, what was their speed? • Step 1: • d = 800.0 m • t = 2.5 min x 60 s/min = 150 s • v = ? Focus of the question

  19. Sample 1 • A person runs 800.0 m in 3.5 minutes, what was their speed? • Step 2: • Already solved for v

  20. Sample 1 • A person runs 800.0 m in 3.5 minutes, what was their speed? • Step 2: • Already solved for v • Step 3:

  21. Sample 1 • A person runs 800.0 m in 3.5 minutes, what was their speed? • Step 2: • Already solved for v • Step 3: • Step 4:

  22. Sample 1 • A person runs 800.0 m in 3.5 minutes, what was their speed? • All together • d = 800.0 m • t = 3.5 min x 60 s/min = 210 s • v = ? : Step 2 Step 3 Step 1 Step 4

  23. Sample 2 • A 25.0 N force is used to push a 200.0 g object 25.0 m. Determine the acceleration.

  24. Sample 2 • A 25.0 N force is used to push a 200.0 g object 25.0 m. Determine the acceleration. • Step 1: • F = 25.0 N • m = 200.0 g • d = 25.0 m • a = ?

  25. Sample 2 • A 25.0 N force is used to push a 200.0 g object 25.0 m. Determine the acceleration. • Step 1: • F = 25.0 N Fundamental Unit • m = 200.0 g • d = 25.0 m • a = ?

  26. Sample 2 • A 25.0 N force is used to push a 200.0 g object 25.0 m. Determine the acceleration. • Step 1: • F = 25.0 N Fundamental Unit • m = 200.0 g Convert to kg • d = 25.0 m • a = ?

  27. Sample 2 • A 25.0 N force is used to push a 200.0 g object 25.0 m. Determine the acceleration. • Step 1: • F = 25.0 N Fundamental Unit • m = 200.0 g / 1000 = 0.2000 kg • d = 25.0 m • a = ?

  28. Sample 2 • A 25.0 N force is used to push a 200.0 g object 25.0 m. Determine the acceleration. • Step 1: • F = 25.0 N Fundamental Unit • m = 200.0 g / 1000 = 0.200 kg • d = 25.0 m Fundamental Unit • a = ?

  29. Sample 2 • A 25.0 N force is used to push a 200.0 g object 25.0 m. Determine the acceleration. • Step 1: • F = 25.0 N Fundamental Unit • m = 200.0 g / 1000 = 0.200 kg • d = 25.0 m Fundamental Unit • a = ? Focus of the Question

  30. Sample 2 • Step 2: • F = m•a Fundamental equation

  31. Sample 2 • Step 2: • F = m•a Fundamental equation • Solve for acceleration

  32. Sample 2 • Step 2: • F = m•a Fundamental equation • Solve for acceleration • Step 3: • Plug in known values

  33. Sample 2 • Step 2: • F = m•a Fundamental equation • Solve for acceleration • Step 3: • Plug in known values • Step 4: • The acceleration of the object is 125 m/s2

  34. Sample 2 • All Together: • F = 25.0 N • m = 200.0 g / 1000 = 0.2000 kg • d = 25.0 m • a = ? • F = m•a • a= 125 m/s2 Step 1 Step 2 Step 3 Step 4

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