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Did you complete the reading assignment? (Typically this means at least 20-30
minutes looking over the assigned sections of the book.)
☐ yes
☐ no
Some object is moving back and forth in harmonic motion. Where is the
acceleration of that object greatest?
☐ at the midpoint of the motion
☐ at the end points of the motion
☐ same value at every point
Consider a mass m hanging on a spring. We pull the mass downward and
then release it so that it oscillates up and down. If we repeat this
on the moon with the same mass and the same spring, the frequency of the
oscillation will be:
☐ larger
☐ smaller
☐ the same
Two students play with an
extra-long Slinky. The student
on the left end sends waves to the other student by shaking her end back and
forth. After the waves die down, both students take a step backwards and try it
again. How will the speed of the waves now compare to the previous waves?
☐ They will be faster
☐ They will be slower
☐ They will go the same speed
Ralph is confused about pendulums. He read in the textbook that the
period T of a pendulum depends on its length L and on the
acceleration of gravity g,but does not depend on its mass. Ralph thinks
that heavier pendulums should swing with a longer period. After all, if he puts
a heavier weight on the end of the spring, it oscillates more slowly.
Can you help Ralph understand this?
The comments in the next next two boxes go into a big, mostly anonymous text file that I skim through before the morning lecture, using the comments to help me plan class discussion. ("Mostly anonymous", because I can track down who made what comment, but it takes some effort on my part to do so.) Therefore, if you really want to make sure I see your question/comment and answer it individually, you should send it to me via email and not through this form.
Which part of today's assignment was particularly hard or confusing? What
would you like to spend extra time on in class?
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