2.	The statement "Segment scaling is more accurate than 
	whole-body scaling" is true:  usually.

Since segment scaling is tailored to each individual subject, 
it will be at least as accurate for subjects of "average" segment 
scales and more accurate for subjects who deviate from that average.  
However, measurement errors may be a factor if the segment 
measurements are not done carefully.



3.	The accuracy of mass and inertia properties is MUCH LESS 
important to analyses of low speeds activities (e.g., walking) than 
during high speed activities(e.g., throwing a 100 mph baseball).  

Explain:

For high speed activities, accelerations are much higher.  Therefore, 
small changes in mass will have greater effects on force. 



5. Compare the results for your body segment lengths from the two scaling methods.

My body segment with the largest percentage difference is my hand (19%).

My body segment with the smallest percentage difference is my shank (2.8%).



6. True.  The mass of each segment reported by each scaling method is the same.  

The mass of each segment is scaled from body mass, regardless of segment lengths.



7.  Steps for scaling segment mass by segment length


	1.	Divide subject segment length by standard segment length to 
		get length ratios
	2.	Multiply each segment's mass by length ratio to get 
		subject segment	mass
	3.	Add subject segment masses to get segment-based body mass
	4.	Divide segment-based body mass by subject body mass to get 
		ratio
	5.	Multiply each segment's mass by single ratio to get scaled 
		subject segment mass
	
	These masses will be scaled by segment length, and will add up to 
	the total body mass.