What Went Wrong? Calculating the Max Height of a Projectile at a 30 Degree Angle

AI Thread Summary
The discussion centers on calculating the maximum height of a projectile launched at a 30-degree angle with an initial speed of 0.714 m/s. The initial attempt used the equation V² = V₁² + 2ad, leading to an impractical height of 19.49 meters. Participants pointed out that the calculations may have been flawed, particularly in the application of the formula. It was noted that the expected result should yield a smaller height, indicating a potential error in the math. The conversation highlights the importance of correctly applying physics equations to avoid unrealistic outcomes.
Bobbert
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Homework Statement


Find the max height of a projectile fired at an angle of 30 degrees if it's inital speed is 0.714m/s.
(this is a lab so I have other data that might be needed)

Homework Equations


V22=V12+2ad

The Attempt at a Solution


V22=V12+2ad
0=(0.714sin30o)2+2(-9.81)(d)
d=19.62-0.127449
d=19.49m

Now this answer is not practical at all. There is no way my projectile went that high. Maybe a couple meters, but not 19.5m. Where did I go wrong?
 
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Bobbert said:
3. The Attempt at a Solution
V22=V12+2ad
0=(0.714sin30o)2+2(-9.81)(d)
d=19.62-0.127449
d=19.49m

Now this answer is not practical at all...

Maybe it's your math that isn't practical?

Shouldn't you get a result that is a small number divided by a big number?
 
If v2=0

then 0=V12-2(9.81)d

d=\frac{V_1^2}{2(9.81)}
 
wow, it is way to late. How did I mess that up.
 

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