Free Printable WorksheetScienceGrade 12Science Curriculum12.58

12.58 Power and Efficiency Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Physics Science worksheet provides structured practice on 12.58 Power and Efficiency. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Power and Efficiency: Calculate or interpret power, work rate, energy transfer rate, and efficiency in machines or biological systems. Aligned to NGSS, CCSS Literacy and Mathematics, AP Physics, and selected state frameworks 12.58 - Power and Efficiency: NGSS HS-PS3-1, HS-PS3-2, HS-PS3-3, HS-PS3-5; CCSS HSN-Q.A, HSA-CED.A, HSF-IF, HSS-ID; AP Physics 1 Unit 3; AP Physics C: Mechanics energy enrichment; TX TEKS Physics §112.45(c) energy; FL SC.912.P.10.1, SC.912.P.10.2; VA PH.4; MA/CA/NY HS-PS3.

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Physics

Subject

Science

Domain

Science Curriculum

Formats

PDF & DOCX

Sample Practice Problems

Preview the types of problems and questions covered in this worksheet

Below are sample questions representative of the exercises included on this worksheet and related 12.58 Power and Efficiency skill assessments:

Problem 1Difficulty: Mastery

Use the planned design table. A design must provide at least 800 W of useful output power. Which machine meets the requirement with the greatest efficiency?

AMachine A

BMachine B

CMachine D

DMachine C

Solution & Explanation:Useful output powers are A 850 W, B 1050 W, C 810 W, and D 1200 W. All meet the 800 W requirement, but Machine C has the greatest efficiency at 90%.

Problem 2Difficulty: Mastery

A gravity energy-storage system uses 2.0 MJ of electrical input to lift a mass. The lifting motor is 80% efficient, and the generator later returns 90% of the stored gravitational energy as electricity. What is the round-trip efficiency?

A70%

B80%

C72%

D90%

Solution & Explanation:The storage stage keeps 0.80 of the input as gravitational potential energy, and the return stage keeps 0.90 of that. Overall efficiency is 0.80 x 0.90 = 0.72, or 72%.

Problem 3Difficulty: Mastery

Use the planned graph comparing output power and efficiency versus load. Which load gives the highest efficiency while still meeting a minimum useful output power of 600 W?

A20 N

B40 N

C60 N

D80 N

Solution & Explanation:The 20 N load does not meet the 600 W requirement. Among loads that do, 40 N has the highest efficiency at 70%, compared with 68% at 60 N and 55% at 80 N.

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Frequently Asked Questions

Common questions about printing, using, and solving this worksheet

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QIs this 12.58 Power and Efficiency worksheet free for teachers and homeschoolers?

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Yes! In addition to this printable worksheet, students can practice 12.58 Power and Efficiency interactively on our platform with automated grading, instant score tracking, and detailed step-by-step solutions.

QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Physics Science students. It aligns with educational standard 12.58 (NGSS HS-PS3-1, HS-PS3-2, HS-PS3-3, HS-PS3-5; CCSS HSN-Q.A, HSA-CED.A, HSF-IF, HSS-ID; AP Physics 1 Unit 3; AP Physics C: Mechanics energy enrichment; TX TEKS Physics §112.45(c) energy; FL SC.912.P.10.1, SC.912.P.10.2; VA PH.4; MA/CA/NY HS-PS3.).