# Warm-Up Exercise for lecture 25

## Due 8:00 am, Tues, Dec 2

Physics 105, Fall 2008

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 weight downward and then release it so that it oscillates up and down. If we repeat this on the moon with the same weight 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?