Ball off ramp to floor

Everyone should submit the following, using the Submit Work Form at http://vhcc2.vhcc.edu/dsmith/submit_work.htm .  This is in two parts, the first related to data you took in class and the second to activities to be done with the materials you took home and the TIMER program.  These can be submitted in one document or in parts.

If you weren't in class to do this:

We measured the landing positions of the ball after rolling down three ramps, one supported by a domino lying flat on its side (least steep), one supported by the domino lying on its long edge and one supported by the domino lying on its short edge (steepest).  You have some dominoes, a ball and a ramp so if you didn't get to do this at the beginning of class, you should be able to do it now.

Assuming that the ball fell to the floor in .4 seconds, after leaving the end of the ramp, and that after leaving the ramp its horizontal velocity remains constant:

How fast was it traveling in the horizontal direction when the domino was lying flat on its side?

 

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How fast was it traveling in the horizontal direction when the domino was lying on its long edge?

 

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How fast was it traveling in the horizontal direction when the domino was lying on its short edge?

 

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Ball drop

A ball was dropped from a height at the same time the 'bracket pendulum' was released.  The height of the ball and/or the length of the pendulum were adjusted to synchronize the sound of the ball striking the floor with the second strike of the pendulum.

From what height did the drop of the ball synchronize with the second 'hit' of the pendulum, and what was the length of the pendulum?

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How long should it have taken the pendulum between release and the second 'hit'?  On what do you base this answer?

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Given you answer to the preceding, you know the time required for the ball to fall from rest to the floor, and you know how far it fell.  What therefore was its acceleration?

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