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Reversible Mouse Trap Vehicle

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by

Michelle Huynh

on 9 June 2015

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Transcript of Reversible Mouse Trap Vehicle

Materials used to build our vehicle
Our Blueprint and Design Drawing
Weight of the materials
CD: 16g
Dowel Stick: 5.4g
Straw: 0.7g
Bottle Cap: 2g
Balloon: 1.8g
Zip tie: 1.3g

Total Weight of the car: 162g
Weighs less than an iPhone 6 plus!
Energy Source
Work done by the spring when it is set (at rest) powers the car's movement, forward and back.


Calculating the Work Done
W = F x d
W = (Force applied to set trap)(πr)
W = (1.8N)(π)(0.3m)
W = 1.7 J
Conservation of Energy
E = W + E

The wound up spring will tend to go back to equilibrium = some of this stored energy will be converted to Ek

E = mv

E = 0.5(0.162kg)(16m/30s)
E = 2.3 x 10 J
The end.
Reversible Mouse Trap Vehicle
By: Michael, Mark, Michelle and Raymond
How We Built Our Vehicle
Zip Ties
Wooden Dowels
Super Glue
Invisible Tape
String
CD's
Straw
Bottle Caps
Balloons
To make the driver axle we glued the straw to the frame and attached a string to the top of another dowel to make the driver axle sturdy.
We also used a zip tie on the driver axle to act as a hook for the string to attach to
We glued the mouse traps together along with the dowels to make the frame
To make the wheels we used two CD's and glued the bottle caps along the axle, we also used the balloons for grip.
To make the lever we used the dowel/zip ties and attached it to the mouse traps.
Overview
Of
Our
Vehicle
Unset
Set
How it runs
The mousetrap car is propelled by the energy from the wound spring.
t
k
Momentum on the Way Back
Using E , even with the string and the spring fully unwound, the car will continue to coast a certain distance, until it loses all its E to Friction = V = 0 m/s


k
k
2
1
/
2
k
k
2
-2
k
f
Points for Improvement
Fix axle to make movement more linear
Use better materials (grip for wheels,
lighter material for faster movement, etc.)
Thicker wheels (two cds instead of one) to make it less wobbly
Use sturdier string (ex. fishing line) to prevent string from snapping during runs
Full transcript