Engineering Challenge: Design a top to spin the longest
https://www.tiktok.com/@addisonhilkert/video/7206414195238260011?_r=1&_t=8aLS6XSthL1
Block 5
Directions:
Gather whatever random supplies you want
Test out a few things
Commit to a design you think will work best and/or time all of your designs
You WILL need mass and radius of each component of the top to calculate the final rotational inertia, so you may want to collect that information as you go
Background information via chatGPT
Higher total I should correlate with longer time rotating
example & Best Time (make a copy of this slide & change it for your top)
Component | Rotational Inertia Equation | Mass of object (g → kg) | Radius of object (cm → m) | Rotational Inertia (I) [kgm2] |
Wood disc (top) | 1/2mr2 | | | |
Metal disc | 1/2mr2 | | | |
Plastic lid (ring) | mr2 | | | |
Marble (bottom) | 2/5mr2 | | | |
| | | TOTAL | |
Sophia, Isabelle, Bri
Component | Rotational Inertia Equation | Mass of object (g → kg) | Radius of object (cm → m) | Rotational Inertia (I) [kgm2] |
Cork (top) x2 | 1/2mr2 | 0.01kg | 0.009m | 4.05e-7 |
Metal disc | 1/2mr2 | 0.05kg | 0.01m | 2.5e-4 |
Plastic lid (ring) | mr2 | 0.02kg | 0.05m | 5e-5 |
Marble (bottom) | 2/5mr2 | 0.16kg | 0.005m | 1.6e-6 |
| | | TOTAL | 3.02e-4 |
Malaina & Norah
Component | Rotational Inertia Equation | Mass of object (g → kg) | Radius of object (cm → m) | Rotational Inertia (I) [kgm2] |
Clear disc (top) | 1/2mr2 | .00344kg | 0.025m | 2.15 x 10^-6 |
Metal ball | 1/2mr2 | .02824kg | 0.0143m | 5.77 x 10^-6 |
wooden stick | mr2 | .00066kg | 0.003m | 5.94 x 10^-9 |
| | | TOTAL | 7.93 x 10^-6 |
Maddie & Mia
example & Best Time (make a copy of this slide & change it for your top)
Component | Rotational Inertia Equation | Mass of object (g → kg) | Radius of object (cm → m) | Rotational Inertia (I) [kgm2] |
Wood disc (top) | 1/2mr2 | 0.0036 kg | 0.039 m | 2.74 x 10^-6 |
Metal disc | 1/2mr2 | 0.0150 kg | 0.0125 m | 1.17 x 10^-6 |
Plastic lid (ring) | mr2 | 0.0057 kg | 0.025 m | 3.56 x 10^-6 |
Marble (bottom) | 2/5mr2 | 0.0163 kg | 0.0088 m | 5.05 x 10^-7 |
18.45 | 17.24 | 15.99 | TOTAL | 7.98 x 10^-6 |