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Forces & Engineering

Grade 2 · Stretch challenge · 8 questions · Version PG-1XYH7TZ-17XB

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1.Explain “magnet” in your own words.
2.Explain “unbalanced forces” in your own words.
3.Explain “prototype” in your own words.
4.Explain “constraint” in your own words.
5.Explain “Newton's third law” in your own words.
6.Explain “electric circuit” in your own words.
7.Explain “mechanical advantage” in your own words.
8.Explain “balanced forces” in your own words.

Answers and teaching notes

Use the answers to check the work after the learner finishes. For writing prompts, the guide describes what a strong response should include.

Show answers for version 10
  1. Explain “magnet” in your own words.an object producing a field that attracts or repels certain materials
  2. Explain “unbalanced forces” in your own words.forces producing a nonzero net force
  3. Explain “prototype” in your own words.an early model used to test a design
  4. Explain “constraint” in your own words.a limit a design must satisfy
  5. Explain “Newton's third law” in your own words.forces occur in equal and opposite pairs
  6. Explain “electric circuit” in your own words.a complete path through which electric charge can move
  7. Explain “mechanical advantage” in your own words.the factor by which a machine multiplies force
  8. Explain “balanced forces” in your own words.forces with zero net effect on motion

Worked example

Identify forces, constraints, and evidence from a test before revising a design.

Common mistake

Changing several variables at once and losing a fair comparison.

Helpful hint

Change one feature and measure the result.