Tangential and Radial acceleration - Sin and Cos simple question

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SUMMARY

The discussion centers on the application of trigonometric functions in physics, specifically regarding tangential and radial acceleration. The user seeks clarification on why cosine is used for the tangential component of acceleration and sine for the radial component. The fundamental principle is based on the definitions of sine and cosine in relation to right triangles, where cosine represents the adjacent side over the hypotenuse, and sine represents the opposite side over the hypotenuse, as outlined by the mnemonic SOHCAHTOA.

PREREQUISITES
  • Understanding of basic trigonometry, specifically sine and cosine functions.
  • Familiarity with the concepts of tangential and radial acceleration in physics.
  • Knowledge of free body diagrams (FBD) and their application in solving physics problems.
  • Basic understanding of kinematics and dynamics in physics.
NEXT STEPS
  • Study the application of trigonometric functions in physics problems involving circular motion.
  • Learn how to construct and analyze free body diagrams (FBD) for various physical scenarios.
  • Explore the relationship between tangential and radial acceleration in circular motion.
  • Review the principles of kinematics to understand motion in two dimensions.
USEFUL FOR

Students studying physics, particularly those focusing on mechanics, as well as educators looking for clear explanations of trigonometric applications in acceleration concepts.

nukeman
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Homework Statement



Im confused about something. Ill post the answer sheet to a question. It has all the data you need. BELOW:

NOW... for Tangential component of the acceleration, WHY did they pick cos?

and for Radial, WHY did they pick sin? I am starting to do a lot of FBD to equations also, and having trouble understanding picking between sin and cos ?

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Homework Equations





The Attempt at a Solution

 
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Cosine is adjacent/hypotenuse.

Sine is opposite/hypotenuse.

SOHCAHTOA
 

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