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Here is the problem (Q3 (A));
Here's what I have so far;
Any help would be appreciated, thank you!
Here's what I have so far;
Any help would be appreciated, thank you!
Yes I realised this after I posted, I'll try that, thanks!It appears you made an algebra error when you went from ## 21 \cos \alpha = \frac {30}{ t} ## to ## \cos \alpha = \frac {630}{ t} ##.
Also, I would first find your time of impact based on your horizontal component.
With that time of impact, you can make an expression that is in terms of alpha only.
Could you elaborate on this a bit? Not quite sure what you mean..I made a substition of x = cos^2(alpha) and manipulated it into a quadratic equation to get the two solutions.
part b comes right out of part a if you have already solved for time of impact.