Finding launch angel from velocities

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The discussion revolves around finding the launch angle based on a series of given velocities at different time intervals. The initial velocity at t=0 is v=2i + 4j, which indicates the launch velocity. A participant expresses confusion about calculating the launch angle from these vectors. The conversation highlights the importance of understanding vector components in physics. Overall, the thread emphasizes the need for clarity in vector analysis for accurate problem-solving.
ijd5000
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I'm having troubling finding a launch angel from a set of given velocities.

v=2\hat{i}, 4\hat{j} at t=0

v=2\hat{i}, 2\hat{j} at t=1

v=2\hat{i} at t=2

v=2\hat{i}, -2\hat{j} at t=3

the g=-2 on this planet
 
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hi ijd5000! welcome to pf! :smile:
ijd5000 said:
I'm having troubling finding a launch angel from a set of given velocities.

angel? o:)
v=2\hat{i}, 4\hat{j} at t=0

doesn't this line tell you the launch velocity? :wink:
 
Thanks for the welcome!

got it, I'm still a bit shaky with vectors.
 

Thread 'Reference frames, center of rotation, etc'

Topic about reference frames, center of rotation, postion of origin etc Comoving ref. frame is frame that is attached to moving object, does that mean, in that frame translation and rotation of object is zero, because origin and axes(x,y,z) are fixed to object? Is it same if you place origin of frame at object center of mass or at object tail? What type of comoving frame exist? What is lab frame? If we talk about center of rotation do we always need to specified from what frame we observe?
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