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12.70 Momentum and Energy Comparison Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Physics Science worksheet provides structured practice on 12.70 Momentum and Energy Comparison. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Momentum and Energy Comparison: Select whether momentum, kinetic energy, both, or neither are conserved in a given interaction. Aligned to NGSS, CCSS Literacy and Mathematics, AP Physics, and selected state frameworks 12.70 - Momentum and Energy Comparison: NGSS HS-PS2-2, HS-PS2-3; CCSS HSN-Q.A, HSA-CED.A, HSF-IF, HSS-ID; AP Physics 1 Unit 4; AP Physics C: Mechanics momentum enrichment; TX TEKS Physics §112.45(c) conservation; FL SC.912.P.12; VA PH.4; MA/CA/NY HS-PS2.

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 12.70 Momentum and Energy Comparison skill assessments:

Problem 1Difficulty: Mastery

Two monatomic ideal-gas molecules collide in a model that excludes external forces, radiation, and internal excitation. For the two molecules as the system, which conservation statement is correct?

AMomentum conservation applies, but kinetic-energy conservation does not, for the ideal gas molecule collision.

BTotal kinetic energy remains fixed, whereas momentum does not, for the ideal gas molecule collision.

CNeither quantity is conserved for the ideal gas molecule collision.

DBoth total momentum and total kinetic energy are conserved for the ideal gas molecule collision.

Solution & Explanation:The isolated molecule pair conserves total momentum. With an ideal elastic molecular collision and no internal excitation or dissipation, total kinetic energy is also conserved.

Problem 2Difficulty: Mastery

Two carts with strong magnets are pushed together and released from rest on an air track. The carts move apart without touching. For the two carts, which conservation statement is correct?

AThe system conserves neither total momentum nor total kinetic energy in the magnet-cart system.

BKinetic-energy conservation applies, but momentum conservation does not, for the magnet-cart system.

CTotal momentum remains fixed, whereas kinetic energy does not, for the magnet-cart system.

DBoth quantities are conserved for the magnet-cart system.

Solution & Explanation:The magnetic forces between carts are internal, so total momentum is conserved. Kinetic energy increases from stored magnetic potential energy, so kinetic energy is not conserved.

Problem 3Difficulty: Mastery

A skateboarder and board are initially at rest. The skateboarder jumps forward, and the board rolls backward on nearly frictionless ground. For the skateboarder plus board, which statement is correct?

ABoth conservation laws apply to total momentum and total kinetic energy for the skateboarder-board system.

BThe system keeps total momentum, not total kinetic energy, in the skateboarder-board system.

CMomentum is not conserved and kinetic energy is not conserved for the skateboarder-board system.

DTotal kinetic energy remains fixed, whereas momentum does not, for the skateboarder-board system.

Solution & Explanation:The push is internal to the skateboarder-board system, so total momentum remains zero. Kinetic energy increases because chemical energy in the skateboarder is transformed into motion.

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Frequently Asked Questions

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Physics Science students. It aligns with educational standard 12.70 (NGSS HS-PS2-2, HS-PS2-3; CCSS HSN-Q.A, HSA-CED.A, HSF-IF, HSS-ID; AP Physics 1 Unit 4; AP Physics C: Mechanics momentum enrichment; TX TEKS Physics §112.45(c) conservation; FL SC.912.P.12; VA PH.4; MA/CA/NY HS-PS2.).