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Forces & Engineering

Grade 1 · Stretch challenge · 8 questions · Version PG-160E9SY-O7SX

1.

Explain “potential energy” in your own words.

2.

Explain “unbalanced forces” in your own words.

3.

Explain “balanced forces” in your own words.

4.

Explain “prototype” in your own words.

5.

Explain “Newton's third law” in your own words.

6.

Explain “constraint” in your own words.

7.

Explain “mechanical advantage” in your own words.

8.

Explain “electric circuit” 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 “potential energy” in your own words.stored energy based on position or condition
  2. Explain “unbalanced forces” in your own words.forces producing a nonzero net force
  3. Explain “balanced forces” in your own words.forces with zero net effect on motion
  4. Explain “prototype” in your own words.an early model used to test a design
  5. Explain “Newton's third law” in your own words.forces occur in equal and opposite pairs
  6. Explain “constraint” in your own words.a limit a design must satisfy
  7. Explain “mechanical advantage” in your own words.the factor by which a machine multiplies force
  8. Explain “electric circuit” in your own words.a complete path through which electric charge can move

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.