Hi, I did a physics lab on projectiles launched at various angles. We launched a

Question

Hi,

I did a physics lab on projectiles launched at various angles.
We launched a dart from a nerf gun at 45 degrees and found the maximum range.

However, the theoretical and actual maximum ranges were very different. What could be some "physics" explanations as to why this happened?
The only force acting on the projectile should be gravity. Would friction be a force that influenced our results? What else could influence the difference between actual and theoretical (besides human error/error in the guns)

Explanation / Answer

see range=v^2 sin(2*theta)/g [found mathematically] so for range to be max; sin(2theta) has to be 1 so sin(2 theta)=1 2 theta=90 degree so theta=45 degree so by this way u can see that range is max at 45 degree

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