Transcript Rubberband Cars and Elasticity

Final Project
Brian Conicker
Teddy Egnaczyk
1.Setup
1.Setup
Continued
https://www.youtube.com/watc
h?v=qrmJqEmlsaM
Materials
Ramp:
Cardboard, Glue, Wood
Rubber Band Cars
Popsicle Sticks, Wooden Dowel Rods, Metal Rods, Straws
Milk Bottle Caps, Glue, Duct Tape
2. Calculations
1. Elastic Potential Energy
- Rubber Band stretched to 30 cm = PE = .9614 J
2.
Mechanical Energy
- Max speed calculated of Rubber Band Car = 1.1 m/sec
- .0228 J
3. Velocity needed to complete loop
- Velocity = 2.1 meters / second
- =MUST FASTER THAN THE RUBBER BAND CARS
2. Calculations
continued
4. Mechanical Energy of Rubber Band Car
- .2783 J
- Most of the Energy was not transferred to the forward velocity
5. Mechanical Energy of Regular Car
- 3.08 m/sec = Greater than the necessary speed to complete loop
- .511 J of Mechanical Energy
6.
3. Trials
-Ramp
-Very flimsy
-We attempted to support it with wooden blocks
-Rubber Band Cars
-Sturdy
-Worked well except for wheels
-With correct adjustments they were able to pick up a velocity
3. Trials
continued
-Launching Pad
-More consistent velocity
-Met velocity requirement
-Completed loop easily
4.Error Analysis
1. Rubber Band Cars
a. Loss of traction on wheels
b. Inconsistent application of force from rubber band
c. Material / Size of wheels
2. Ramp
a. Needed to be more rigid
b. Cardboard connection points should have been smoothed out
3. Launching platform
a. Inconsistent application of force