Another one that's been troubling me

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AI Thread Summary
The discussion revolves around a physics problem involving projectile motion, where a student throws a ball at a 60-degree angle while on a moving train. The initial velocities in the x and y directions are calculated, with Vx at 5 m/s and Vy at 8.66 m/s. The maximum height formula used is dyMax = (Vy^2) / (2g), leading to a calculated height of 3.822 meters. However, there is uncertainty about the correctness of this answer, particularly regarding the relevance of the horizontal velocity and gravity components. The conversation highlights the need for clarity on the role of horizontal motion in the context of the problem.
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Homework Statement


A student is riding on a flatcar of a train traveling along a straight horizontal track at a constant speed of 10.0 m/s. The student throws a ball along a path that she judges to make an initial angle of 60 degrees with the horizontal and to be in line with the track. The student's professor, who is standing on the ground nearby, observes the ball to rise vertically. How high does the ball rise?


Homework Equations


These are what I'm pretty sure are necessary:

dyMax = maximum height of y
Vi = initial velocity
g = gravity

dyMax = (Vi^2) / (2g)

The Attempt at a Solution



Vx = 10cos60 = 5 m/s
Vy = 10sin60 = 8.66 m/s

gx = 0
gy = 9.81

dyMax = (8.66^2) / (2 * 9.81)

I got 3.822 meters as the answer, although I'm pretty sure that's wrong. Any ideas? Thanks.
 
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Why do you think it's wrong? And why do you list Vx and gx?
 

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