Works Over Time Works Every Time Eric Larson Wren Jackson Christian Moore ERIC LARSON WREN JACKSON CHRISTIAN MOORE

Overview Steps Applied concepts Circular Motion Inclines Gravity Mousetrap Pulleys Applied concepts Conservation of momentum and energy Torque Forces

1. Marble rolls around bottle onto track Operation 1. Marble rolls around bottle onto track 2. Ball runs through track 3. Ball falls through wood boards and onto the mouse trap, triggering it

Operation 6. Pulled wire goes through pulley and triggers the remote car moving car forward 5. Falling marble triggers the 2nd mouse trap, pulling wire 4. As mouse trap is triggered, the plank under 2nd marble is pulled away. Releasing marble

Calculations Step I: The Decline. Conservation of translational/rotational energy: m₁gh=½m₁v ₁ ²+½I ₁ ω ₁ ² Step II: First Marble Drop. Conservation of translational energy m1gh= ½ mv2 Step III: First Mousetrap. Energy of Mousetrap: E= ½ kx2 Step IV: Second Drop. Conservation of translational energy mgh = ½ mv2 Step V: Second Mousetrap. Energy of Second Mousetrap: E = ½ kx2 Step VI: Pulley to Car Remote ∑τ = T1*R+T2*R Variables: m  mass g  gravity h  height v  velocity I  mass moment of inertia ω  angular velocity k  spring constant x  distance of compression E  energy τ  torque T  tension R  radius of pulley Subscripts: 1 marble p pulley

Setbacks Getting the marble to consistently land on the first mousetrap Finding away for the second, large marble to land straight down without popping out Making the tensions in the string just right to trigger the remote

Summary Factors that weren’t calculated affected movement of the project Simplicity is key