You are constructing a bionic arm and need to find the force on the joint of someone holding a standard grocery bag. Using the picture below, A) calculate the force of the bicep first in keeping the bag stable (still). B) then calculate the force on the joint that your bionic arm joint must be able to withstand to function like a regular arm as in this situation. M 1kg 3kg 2cm 5.5cm 28cm Distances the force is from the joint.