(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A ball is hit from the ground with an angle of 36 degrees above the horizontal. The ball hits a target 30m ahead and 4m above the ground. Find the initial velocity of the ball.

2. Relevant equations

V_{avg}= Δd/Δt

a_{avg}= Δv/Δt

Δd = v_{o}Δt + 1/2aΔt^{2}

3. The attempt at a solution

Δx = 30m

Δy = 4m

V_{ox}= V_{o}* cos 36

V_{oy}= V_{o}* sin 36

Δx = v_{ox}Δt + 1/2a_{x}(Δt)^{2}

Δx = (V_{o}* sin 36)Δt + 1/2a_{x}(Δt)^{2}

Since a_{x}= 0 then

Δx = (V_{o}* sin 36)Δt

This question appeared on a quiz today and caught me totally by suprise. My teacher had never assigned homework questions like this ever and my textbook did not have any questions like it either. I've asked my teacher for help, but he didn't give me a clear answer. I've tried this question again at home for another two hours but I still couldn't get anything out of it. I know I have to find Δt, but I can't seem to isolate it. I would put all my attempts on the post, but I have already destroyed them in my fustration. Please help me! I'm losing my mind!

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# Homework Help: Finding initial projectile velocity with angle and a point in the path?

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