Please answer only 6.10 but I will still attach 6.6 for reference.

6.10 Reexamine Example 6.6 in the text concerning the muscles in the forearm. Find the same forces if there were a 5.0 - lbm weight held in the hand. The center of mass of the weight held in the hand is 45 cm from the elbow. The x-component of the force in the elbow is 24 N.

6.6 You are separating DNA strands in a tube containing a sugar/agarose gel using ultracentrifugation (Figure 6.39). The sugar/agarose gel has been prepared with a density gradient as follows: gel=1.1+0.004d2 where d is the distance into the gel in the tube. (gel has units of g/cm3 when d is specified in units of cm.) The mass of the DNA is 3.21012g, and the volume of the DNA is 2.561012cm3. The distance between the center of the ultracentrifuge and the top of the gel is 5cm. The ultracentrifuge is operating at 12,000rpm. Note that the acceleration of the DNA in the radial direction is the sum of the centripetal acceleration and linear acceleration toward the end of the tube. Ignore drag so that the only force acting on the DNA is the buoyant force from the gel. When examining the buoyant force, only consider the centripetal acceleration for the gel. At what depth does the DNA stop? In other words, at what point does the buoyant force result in exactly the centripetal acceleration