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12.89 Doppler Effect Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Physics Science worksheet provides structured practice on 12.89 Doppler Effect. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Doppler Effect: Select how observed frequency changes when sources and observers move toward or away from one another. Aligned to NGSS, CCSS Literacy and Mathematics, AP Physics, and selected state frameworks 12.89 - Doppler Effect: NGSS HS-PS4-1, HS-PS4-2, HS-PS4-3, HS-PS4-4, HS-PS4-5; CCSS HSN-Q.A, HSF-IF, HSG-MG, RST.11-12.7; AP Physics 1 oscillations; AP Physics 2 waves, sound, physical optics, geometric optics; TX TEKS Physics §112.45(c) waves/light; FL SC.912.P.10, SC.912.P.12; VA PH.5/PH.7; MA/CA/NY HS-PS4.

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 12.89 Doppler Effect skill assessments:

Problem 1Difficulty: Mastery

In a simulation, a stationary source and moving observer are used to create equal-magnitude upward and downward frequency changes around 500 Hz. Which pair of observer motions should be chosen?

ASource toward the observer at 20 m/s and source away from the observer at 20 m/s.

BObserver toward at 20 m/s and source away at 20 m/s.

CSource toward at 40 m/s and observer away at 20 m/s.

DObserver toward the source at 20 m/s and observer away from the source at 20 m/s.

Solution & Explanation:For a moving observer, f' = f(v +/- v_o)/v, so equal speeds toward and away produce equal magnitude changes above and below the emitted frequency. Moving-source shifts are not symmetric in simple frequency difference.

Problem 2Difficulty: Mastery

A sound source moves toward a stationary observer, and the observed frequency is 1.25 times the emitted frequency. If sound speed is 340 m/s, what is the source speed?

A85 m/s toward the observer.

B68 m/s away from the observer.

C68 m/s toward the observer.

D272 m/s toward the observer.

Solution & Explanation:For an approaching source, 1.25 = 340/(340 - v_s). Thus 340 - v_s = 272, so v_s = 68 m/s.

Problem 3Difficulty: Mastery

A stationary sound source is heard by an observer moving toward it. The observed frequency is 1.25 times the emitted frequency. If sound speed is 340 m/s, what is the observer speed?

A68 m/s toward the source.

B85 m/s toward the source.

C85 m/s away from the source.

D272 m/s toward the source.

Solution & Explanation:For a moving observer, 1.25 = (340 + v_o)/340. Thus v_o = 0.25(340) = 85 m/s toward the source.

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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 12.89 (NGSS HS-PS4-1, HS-PS4-2, HS-PS4-3, HS-PS4-4, HS-PS4-5; CCSS HSN-Q.A, HSF-IF, HSG-MG, RST.11-12.7; AP Physics 1 oscillations; AP Physics 2 waves, sound, physical optics, geometric optics; TX TEKS Physics §112.45(c) waves/light; FL SC.912.P.10, SC.912.P.12; VA PH.5/PH.7; MA/CA/NY HS-PS4.).