How Long to Reach Maximum Height for a 70 m/s Projectile at 45 Degrees?

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Homework Help Overview

The problem involves a projectile launched at an initial speed of 70 m/s at a 45-degree angle, with the goal of determining the time it takes to reach maximum height. The subject area pertains to kinematics and projectile motion.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the initial vertical velocity and the use of trigonometric functions to resolve components of the velocity. Some express uncertainty about which formulas to apply and question the definitions of angles used in the equations.

Discussion Status

The discussion is ongoing, with participants attempting to clarify their understanding of the relevant equations and the definitions involved. There is a mix of attempts to apply equations and expressions of confusion regarding the starting point for solving the problem.

Contextual Notes

Some participants note the importance of showing previous attempts to facilitate guidance. There are references to specific guidelines for discussion, indicating a structured approach to problem-solving is encouraged.

Cortana
Member warned that posters must show what they have tried

Homework Statement


A projectile was launched at 70 m/s at an angle of 45 degrees above the horizontal, how long does it take the projectile to reach maximum height?

Homework Equations


Vyo= initial vertical velocity Vo=initial velocity

The Attempt at a Solution


I tried using the equation Vxo=VoSIN(theta)
 
Last edited by a moderator:
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Cortana said:
I tried using the equation Vxo=VoSIN(theta)
No.
You need to show what you've tried so that we can see what went wrong.
 
I don't even know where to start tbh, i don't even know which formula to use
 
Cortana said:
I tried using the equation Vxo=VoSIN(theta)
Did you mean that? It could be right, depending on how exactly you are defining theta. What angle do you think it represents?
Double check your source for that equation.
 
try using trig ratios and SUVAT equations
 

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