Download Energy Conservation with a Rubber Band Instructions

Energy Conservation with a Rubber Band Instructions
1.
Watch the video “Energy Conservation with a Rubber Band Video”.
2.
Put the diagrams shown in the online notebook in your lab notebook.
3.
Put the table shown in the online notebook in your lab notebook.
4.
Find the mass of the air disk and put the data in the table.
5.
Attach the rubber band to the table legs as shown in the video.
6.
Measure the force required to pull the air disk back 0.5 m as shown in the
video and use this data to find the spring constant of the rubber band.
Make sure your force probe is on the 50N setting. Put the spring constant
in the table.
7.
Calculate the potential energy in the spring if it is stretched 0.5 m and
record it in the table. Also record the 0.5 m as the change in x.
8.
Turn on the air and pull the air disk back 0.5 m and release it. Record it
leaving the rubber band with video physics and use two blue dots to find
its speed in Graphical Analysis. Make sure the first dot is after the disk
leaves the rubber band. You must put in a reference distance as
discussed in the video. Record the velocity in the table.
9.
Calculate the kinetic energy of the disk as it leaves the rubber band and
put it in the table.
10.
Find the percentage difference between kinetic energy of the disk as it
leaves the rubber band and the potential energy which was stored in the
rubber band.
11.
Repeat steps 7-10 for pulling the rubber band back 0.4 m. You do not
have to recalculate the spring constant.
12.
Pull the rubber band back 0.5 m with a 1 kg mass and release it. Use
video physics to find the time and distance the mass goes after it leaves
the rubber band. Put the data in the table.
13.
Find the velocity the mass left the rubber band with.
14.
Calculate the kinetic energy of the mass as it leaves the rubber band and
put it in the table.
(see the back for more instructions)
15.
Find the percentage difference between kinetic energy of the mass as it
leaves the rubber band and the potential energy which was stored in the
rubber band. Assume the spring’s potential energy is the same as it was in
part 1.
16.
Repeat 12-15 for pulling the rubber band back 0.4 m.
17.
Complete the Energy Conservation with a Rubber Band Word Problem
Worksheet.