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Forces & Engineering

Grade 2 · On-level practice · 8 questions · Version PG-ZEXHRQ-1K25

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1.Explain “mechanical advantage” in your own words.
2.Explain “prototype” in your own words.
3.Explain “Newton's third law” in your own words.
4.Explain “kinetic energy” in your own words.
5.Explain “electric circuit” in your own words.
6.Explain “magnet” in your own words.
7.Explain “unbalanced forces” 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 15
  1. Explain “mechanical advantage” in your own words.the factor by which a machine multiplies force
  2. Explain “prototype” in your own words.an early model used to test a design
  3. Explain “Newton's third law” in your own words.forces occur in equal and opposite pairs
  4. Explain “kinetic energy” in your own words.energy an object has because of motion
  5. Explain “electric circuit” in your own words.a complete path through which electric charge can move
  6. Explain “magnet” in your own words.an object producing a field that attracts or repels certain materials
  7. Explain “unbalanced forces” in your own words.forces producing a nonzero net 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.