Problems with kinematics equations

[Byrgg]

The angle between the sides is not 136, but 44. (But the resulting magnitude is the same.) Draw a picture to clarify the angles involved. I assume "22 degrees to the board" means that the velocity makes a 22 degree angle with the surface of the board.

How is it 44? The velocities make a v shape with the board, 22 degrees to the board each way. Knowing that the board is 180 degrees, the angle between them should be 180 - (22 + 22), shouldn't it?

 

[Doc Al]

How is it 44? The velocities make a v shape with the board, 22 degrees to the board each way. Knowing that the board is 180 degrees, the angle between them should be 180 - (22 + 22), shouldn't it?

That's the angle between those velocity vectors, but it's not the angle in the triangle that defines the difference between those two vectors:
$$\vec{v}_f - \vec{v}_i$$

Again, draw a picture.

 

[Byrgg]

Ok, I'll draw a picture later at some point, I'm at school right now, so I can't really draw it now, but I'll make one at home, and show exactly how the diagram is set up. Hopefully then you'll be able to help me get a better understanding of this. How long will it take to get an attachment approved, approximately? Or could I just use an image hosting site, and post a link to the diagram?

 

[Doc Al]

How long will it take to get an attachment approved, approximately?

If someone's paying attention, about 2 seconds.

Or could I just use an image hosting site, and post a link to the diagram?

That's OK too.

Be sure to label everything in the diagram clearly.