Free fall without a lot of info.

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SUMMARY

The problem involves calculating the time it takes for a ball thrown horizontally at 16 m/s from a height of 65 m to land. The relevant equation is distance = Vi*t + (at^2)/2, where Vi is the initial velocity, a is the acceleration due to gravity, and t is time. The user initially attempted to separate the x and y components of motion but encountered confusion due to the lack of an angle, which is unnecessary for horizontal projectile motion. The correct approach is to focus solely on the vertical motion to determine the time to land.

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  • Understanding of projectile motion principles
  • Familiarity with kinematic equations
  • Knowledge of horizontal and vertical motion separation
  • Basic grasp of gravitational acceleration (9.81 m/s²)
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  • Review the concept of horizontal projectile motion
  • Study kinematic equations in detail
  • Practice problems involving vertical motion under gravity
  • Learn about the effects of launch angles on projectile trajectories
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Students in physics courses, educators teaching projectile motion, and anyone seeking to understand the dynamics of objects in free fall.

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Homework Statement



A ball is thrown horizontally at 16m/s from a clifftop 65m above the sea level.

Find
the time to land

Homework Equations



distance = Vi*t + at^2/2


The Attempt at a Solution



I separated x and y components. And tried to plug them in this formula. I thought maybe I will have 2 unknowns and will then resolve it by plugging the equation in the other. But I realized I had 3 unknowns since they don't give me the angle. So, I can't find the components of the initial speed.

Maybe, I am using the wrong formula ?

Thanks in advance !
 
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"A ball is thrown horizontally..." What's the launch angle for a horizontally thrown projectile?
 
Oh wow. My problem is that, I've been in french school since I am a kid. Now that I am in an English college for the first time, all the terms and words are different. Thanks !
 
Taz. said:
Oh wow. My problem is that, I've been in french school since I am a kid. Now that I am in an English college for the first time, all the terms and words are different. Thanks !

"It's like those French have a different word for everything!" -- Steve Martin :smile:
 

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