Work Examples/Evidence
Link to first draft of my story
Nutrition Model:
Link to User Manual
Will's Calculation (What I wish I had done)
16/9 * 85.46 = 151.93 Nm
"The calculation for torque generated by a pedal is:
{torque in} * {The ratio of the gears}
To calculate the torque generated by our gear system, we need to examine its individual sections. First we will find the ratio of the gears. We will start this section by counting the spokes of the first two bike gears. We input the information into this equation:
Gear ratio = out/in = driven/driving
Essentially, the gear ratio is: the second gear over the first gear (the gear that is being powered by the pedal.) For our Cocoa Grinder the gear connected to the pedal has 30 spokes while the second gear has 28. Using the equation: driven/driving we can update the formula to:
driven/driving = 30/28 Nm = 15/14 Nm
(The second pair of numbers being the simplified version of the first)
We now know the ratio of the first two gears. Torque In needs to be calculated, which is defined as the power by which you step down on the bicycle pedal. The force of this will vary depending on rider’s weight, but for the purpose of this equation we will use calculations generated by Lucy. Lucy determined the power value to be 79.75 Nm (Newton meters). (If you want to find out how Lucy calculated this value, see the bamboo grinder’s station).
We have:
15/14 * 79.75 Nm = 85.46 Nm
Based on this formula we know that the torque generated from the first to second gear is 85.46 Nm. Torque generated by the third to fourth gear relationship needs to be determined.
The third gear has 18, spokes while the fourth gear has 34. The equation is:
driven/driving = 34/18 = 16/9
The third gear would be the driving gear because it is connected to gear two (which has already been powered.) Because of this connection we can apply the value of 85.46 Nm as the force applied (the torque generated by the first two gears.) We can generate the equation:
16/9 * 85.46 = 151.93 Nm
Thus, the torque generated by all four bike gears is 151.93 Nm. The torque provided to power the cocoa grinder is 151.93 Nm."
Nutrition Model:
Link to User Manual
Will's Calculation (What I wish I had done)
16/9 * 85.46 = 151.93 Nm
"The calculation for torque generated by a pedal is:
{torque in} * {The ratio of the gears}
To calculate the torque generated by our gear system, we need to examine its individual sections. First we will find the ratio of the gears. We will start this section by counting the spokes of the first two bike gears. We input the information into this equation:
Gear ratio = out/in = driven/driving
Essentially, the gear ratio is: the second gear over the first gear (the gear that is being powered by the pedal.) For our Cocoa Grinder the gear connected to the pedal has 30 spokes while the second gear has 28. Using the equation: driven/driving we can update the formula to:
driven/driving = 30/28 Nm = 15/14 Nm
(The second pair of numbers being the simplified version of the first)
We now know the ratio of the first two gears. Torque In needs to be calculated, which is defined as the power by which you step down on the bicycle pedal. The force of this will vary depending on rider’s weight, but for the purpose of this equation we will use calculations generated by Lucy. Lucy determined the power value to be 79.75 Nm (Newton meters). (If you want to find out how Lucy calculated this value, see the bamboo grinder’s station).
We have:
15/14 * 79.75 Nm = 85.46 Nm
Based on this formula we know that the torque generated from the first to second gear is 85.46 Nm. Torque generated by the third to fourth gear relationship needs to be determined.
The third gear has 18, spokes while the fourth gear has 34. The equation is:
driven/driving = 34/18 = 16/9
The third gear would be the driving gear because it is connected to gear two (which has already been powered.) Because of this connection we can apply the value of 85.46 Nm as the force applied (the torque generated by the first two gears.) We can generate the equation:
16/9 * 85.46 = 151.93 Nm
Thus, the torque generated by all four bike gears is 151.93 Nm. The torque provided to power the cocoa grinder is 151.93 Nm."