Place the slinky on the floor and extend it so that it is under tension. Before doing this, ask instructor for some advice. Be careful not to over-extend.

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Presentation transcript:

Place the slinky on the floor and extend it so that it is under tension. Before doing this, ask instructor for some advice. Be careful not to over-extend the slinky, since this causes permanent damage. If this happens, you will be asked to purchase a replacement.

1 Generate pulses by giving the slinky a quick shake at right angles to the length of the slinky. Can you make different pulse shapes? Describe how you make different pulse shapes.

2. How fast do the pulses travel. Estimate the speed of the pulse 2.How fast do the pulses travel? Estimate the speed of the pulse. Then, make the necessary measurements and calculations. Record your results.

3. Change the speed of the pulse 3. Change the speed of the pulse? Describe what you did to change the speed. Record them. Calculate the new speed.

4. Observe carefully what a specific point on a slinky is doing as a pulse goes by. You may wish to stick a piece of masking tape to one of the rings of the slinky to identify a point. Describe what you observe Remove the tape when done..

5. What is happening to the shape of the leading half of the pulse 5. What is happening to the shape of the leading half of the pulse? To the trailing half of the pulse? Make a sketch and then describe what you observe.

6. Make a pulse. Observe its propagation and then make a sketch of the pulse at one instant of time. Then make a sketch of the pulse a very, very short time later. Describe what you found.

7. You have surely noticed that the pulse shape changes as it moves along the slinky. Describe these change(s). How would you expect the pulse to behave if the slinky were suspended so that it didn't touch the floor? What if it was suspended in water? List your predictions. .

Make further observations of a single point or particle of the slinky as a pulse goes from right to left in the slinky. Sketch the ‘left’, ‘right’ deflection of a particle as a function of time.

9. While observing the propagation of a pulse on the slinky, you may have noticed that the pulse does not vanish when it arrives at the far end. Describe what happens to the pulse as it is reflected.

10. Tie a two meter piece of string onto one end of the slinky and repeat #9. What do you observe