You could also just calculate the center of mass of the mass being held + forearm, and then use that value as the lever arm for an object of mass of 14 kg(10 + 4 = 14 kg). Then, from there, calculate the counter or clockwise torque and get the same value of 4,800 N. I thought you brought up the mallet question earlier bc you were gonna use the center of mass equation again.
For the first calculation, could you also use 0 m for the position of the 3 kg mass, and then calculate the center of mass to be 0.1 m away from the mass, which is the same as 0.4 m away from the end?
Hi Ivy, glad you are enjoying the videos! For the torque calculation of the biceps, I did intend to write cm (centimeter). Conveniently, no unit conversion is required as they cancel out in the calculations. I hope that's clear and let me know if you have more questions!
Hello I have a question, I am confuse on how you know the mallet position is (.5m). I thought the stick was .5m long? thank you
You could also just calculate the center of mass of the mass being held + forearm, and then use that value as the lever arm for an object of mass of 14 kg(10 + 4 = 14 kg). Then, from there, calculate the counter or clockwise torque and get the same value of 4,800 N. I thought you brought up the mallet question earlier bc you were gonna use the center of mass equation again.
Hi! Love your videos they are helping me so much! Quick question, why isn't the 10m/s^2 negative in this case?
How do you know if the torque is CW or CCW? Thanks!
For the first calculation, could you also use 0 m for the position of the 3 kg mass, and then calculate the center of mass to be 0.1 m away from the mass, which is the same as 0.4 m away from the end?
Thank you for all your videos, Ken! They really help. *one minor thing- did you mean to write meter, instead of cm for the torque calculation?
Hi Ivy, glad you are enjoying the videos! For the torque calculation of the biceps, I did intend to write cm (centimeter). Conveniently, no unit conversion is required as they cancel out in the calculations. I hope that's clear and let me know if you have more questions!
Thank you!!
You're welcome!