Solving Equations Using Sin/Cos: Projectile Motion

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Homework Help Overview

The discussion revolves around understanding the application of angles in projectile motion problems, specifically in relation to the equations governing the motion. Participants are exploring how to incorporate angles into their calculations and the implications of using sine and cosine functions.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are attempting to clarify how to use angles in projectile motion equations, particularly questioning whether to substitute initial velocity with its sine or cosine components. There is also a focus on the definition of the angle and its impact on the calculations.

Discussion Status

The discussion is ongoing, with participants seeking further clarification on the definitions and implications of the angle in the context of the equations provided. Some guidance has been offered regarding the dependency on how the angle is defined, but further elaboration is requested.

Contextual Notes

There is an emphasis on understanding the definitions and assumptions related to the angle in the equations, which may not be fully established in the current discussion.

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1. Trying to understand how to work a given angle into an answer in projectile motion problems.

2. ΔX=ViTf+1/2ATf^2
R=2vi^2sinθcosθ/g

3. Well, I know if you're given say 45° then you would use sin for vertical and cos for horizontal. But beyond that, what are you supposed to do with an angle when given one.

ALSO:
For the first equation, do you substitute Vi for Visinθ or Vicosθ?
 
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It depends upon how θ is defined ! (Answer to both questions)
 
SammyS said:
It depends upon how θ is defined ! (Answer to both questions)

Can you explain a little more on that?
 
Let It Be said:
Can you explain a little more on that?

Sure.
 

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