I couldn't assign unit vectors to vf (with direction) as I don't know how to show that on this forum. =/
Also, we haven't been taught "modulus" or is that modules? I don't know what they are.
I just tried it using 158 as the angle and I didn't get the correct answer given again.
I'm calculating the vector components using sin(theta)(Ay), sin(theta)By, cos(theta)Ax, and cos(theta)Bx of course.
I can't seem to find out what I'm doing wrong.
A hockey puck rebounds from a board as shown in Figure 16.
Figure 16 looks like this.
http://img174.imageshack.us/img174/2571/fig16vr6.png
The puck is in contact with the board for 2.5ms. Determine the average acceleration of the puck over the interval.
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So I know you have to use...