Question

If the object has uniform mass distribution, find the center of mass. (hint: think of this object as one piece of a 2-piece compound object whose center of mass you intuitively know.)

(b) To keep the calculations fairly simple but still reasonable, we model a human leg that is 92.0 cm long (measured from the hip joint) by assuming that the upper leg and the lower leg (which includes the foot) have equal lengths and are uniform. For a 70.0-kg person, the mass of the upper leg is 8.60 kg, while that of the lower leg (including the foot) is 5.25 kg. Find the location, (x,y) of the center of mass of this leg, relative to the hip joint, if it is

i. stretched out horizontally and

ii. bent at the knee to form a right angle with the upper leg remaining horizontal.

Answer 1