An object is project upward with a 30 degree launch angle and an initial speed of 39 m/s. How long will it take for the object to reach the top of its trajectory? How high is this?

Question

anonymous · Answer

Can anyone draw me a diagram for this and the steps on how to get to the answers?

anonymous · Answer

easiest way to solve this is to brake up the initial velocity into its y component do you know how to do this?

anonymous · Answer

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anonymous · Answer

you need to find uy, you know U = 39 and the angle A is 30 degrees.

anonymous · Answer

Okay, I found out the height at the top of trajectory, which is 19.5. How do I calculate how long it takes to reach it? The answer is 25 seconds, but I don't know why.

anonymous · Answer

h=-1/2g*t^2 +voy*t

anonymous · Answer

I don't get it, can you explain how to find the time?

anonymous · Answer

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voy=vo*sindelta