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I am about to take Intro Physics this fall and I would like to get a few "what ifs" out of my mind. For starters, I have never been exposed to physics in hs (i choose the adv bio) so please be gentle

When an object of any sort attains a certain height gravity will pull the object down and height h= 1/2 gt^2. Velocity at some time t is = (v*sin$)/g and when its replaced back into the eq it becomes (v*sin$)^2/2g. Right? But when I draw a semicircle and label (x,y) on the x axis how does it "become" v^2sin(2$)/g?

I saw in a book the other day that the average of velocity can be calculated as follows: v_f^2-v_0^2 =2gs. Where does the v^2=2gs terms come from? I notice that when you flip things around you get s = v^2/2g which looks a little similar to t in f(t) for maximum height

Thanks

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# Homework Help: Simple physics q - velocity

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