(adsbygoogle = window.adsbygoogle || []).push({}); Please help, 2D motion problem, projectile movement.

Two dimensional motion with constant acceleration problem,

please help this is the last one i have to solve and i can't come up with anything.

Basketball player covers 2.80m horizontally in a jump.

His center of mass moves through the space as following:

his center of mass is at elevation 1.02m when he leaves the floor,

it reaches a maximum height of 1.85 above the floor, and its at 0.900m when he touches down again.

determine his flight "hang" time, angle of takeoff, horizontal and vertical velocity components at takeoff.

Please help, i don't know where too start, seems like too much is unknown...

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I started by making a drawing, and i thought that since max height and range are given ill go from there, but the motion is not symmetrical

So i wrote out the X and Y motion equations:

Xf = Vix * t = Vi cosA * t , where A is the unknown angle V unknown speed, t unknows time

Xy = Vyx *t = Vi sinA * t + 1/2gt^2

But i cant solve systems because there are 3 unknowns and 2 equations

So i went back to max height and range again, i tried to figure out what the range was for symmetrical movement, but i couldn't since i dont know the angle, and even if i did i wouldn't know what to do with the rest of the motion trajectory, so thats it, im stuck here, i don't even know what to do because it seems that to solve it i need either angle or initial speed..

Help please...

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# Homework Help: Please, need help for a problem.

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