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Forces & Engineering

Grade 1 · Stretch challenge · 8 questions · Version PG-5SLY11-O7SX

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1.Explain “unbalanced forces” in your own words.
2.Explain “kinetic energy” in your own words.
3.Explain “prototype” in your own words.
4.Explain “electric circuit” in your own words.
5.Explain “mechanical advantage” in your own words.
6.Explain “constraint” in your own words.
7.Explain “balanced forces” in your own words.
8.Explain “potential energy” 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 4
  1. Explain “unbalanced forces” in your own words.forces producing a nonzero net force
  2. Explain “kinetic energy” in your own words.energy an object has because of motion
  3. Explain “prototype” in your own words.an early model used to test a design
  4. Explain “electric circuit” in your own words.a complete path through which electric charge can move
  5. Explain “mechanical advantage” in your own words.the factor by which a machine multiplies force
  6. Explain “constraint” in your own words.a limit a design must satisfy
  7. Explain “balanced forces” in your own words.forces with zero net effect on motion
  8. Explain “potential energy” in your own words.stored energy based on position or condition

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.