How Do You Calculate the Correct Launch Angle for a Projectile?

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Homework Help Overview

The discussion revolves around calculating the correct launch angle for a projectile, with specific variables provided related to vertical and horizontal components of motion. Participants are examining the implications of these variables in the context of projectile motion, which typically follows a parabolic trajectory.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • One participant attempts to calculate the launch angle as 72 degrees but expresses uncertainty about the method used, particularly in relation to the parabolic nature of projectile motion. Other participants question the definitions and roles of the variables presented, seeking clarity on terms like U and V, and whether they represent velocities or ranges.

Discussion Status

The discussion is ongoing, with participants actively questioning the definitions of the variables and their implications for the problem. There is no explicit consensus yet, but clarification on variable meanings is being pursued, which may guide further exploration of the problem.

Contextual Notes

There is some confusion regarding the variables used, particularly the designations for Vy and Vx, which are initially interpreted as velocities but later clarified as ranges in the X and Y directions. This misinterpretation may affect the understanding of the problem setup.

MrRandom66
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Homework Statement


Vy - 15m
Vx - 40m
U - 17m/s
V - 0
Time to reach highest point (t) 1.7s

Homework Equations


cos 0 = a/c



The Attempt at a Solution


72 degrees.

Not sure if this is the correct method of calculating the angle, especially since a projectile's trajectory is a parabola.
 
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I am not following the problem's variables.

Vy is usually velocity in the "y" direction in m/s

Vx is usually velocity in the "x" direction in m/s

What is U? It looks like some kind of velocity

What is V? V usually designates some kind of velocity
 
RTW69 said:
I am not following the problem's variables.

Vy is usually velocity in the "y" direction in m/s

Vx is usually velocity in the "x" direction in m/s

What is U? It looks like some kind of velocity

What is V? V usually designates some kind of velocity

U = Initial Velocity
V = Final Velocity, or Velocity at maximum height, hence 0

I actually put the variables wrong, ignore the Vy should be Y and Vx should be X, hence, these aren't velocities, but instead ranges in the X and Y directions.
 
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