# Example 2.1     
 P1  =   16 hp
 V1  =   60.00 mph
 Fd = P1 / V1 ; lbf 
 xd   =   25.00 in
 Wc    =   3000.00 lbf
 xc   =   50.00 in
 xf   =   100.00 in
 Wf = (Wc * xc - Fd * xd) / xf  ; lbf 
 Wr = Wc - Wf  ; lbf

# Example 2.2     
 P1  =   96 hp
 V1  =   60.00 mph
 Pt   =   16 hp
 Ft   =   100 lbf
 f1   =   0.07 
 PL = (P1 - Pt) / (1 + f1) ; hp 
 FL = Ft * (PL / Pt) ; lbf 
 W1  =   3000 lbf
 a = FL / (W1/grav()) ; ft/s^2 

# Example 2.3     
 T1  =   5 N m
 R1  =   0.05 
 Tp = T1 * R1 ; N m 
 Th = T1 - Tp  ; N m

# Example 2.4  
 IPS(lbf in)   
 T1  =   3000 lbf in
 R1  =   2.78 
 Tp = T1 * R1  
 Th = Tp - T1  
 FA   =   2667 lbf  
 FB   =   2667 lbf  
 xB   =   2.00 in
 FC   =   4444.00 lbf  
 xC   =   7.00 in
 xII   =   9.00 in
 FII = (FB * xB - FC * xC) / xII 
 
# Example 2.5     
 F1   =   3000 lbf
 a1  =   1 in
 M = F1 * a1 ; lbf in 

# Example 2.6     
 F32    =   40 lbf
 x32   =   1.50 in
 q42   =   30.00 deg
 x42   =   1.00 in
 F42 = F32 * x32 / x42  ; lbf 
 V12 = F42 * sin(q42)  ; lbf 
 H12 = F32 + F42 * cos(q42)  ; lbf 
 F12 = (H12^2 + V12^2)^(1/2)  ; lbf 
 q12 = atan2(V12 , H12)  ; deg 

# Example 2.7     
 Fthumb    =   10 lbf
 xthumb   =   3 in
 xtendon   =   0.5 in
 Ftendon = Fthumb * xthumb / xtendon  ; lbf 
# Example 2.8     
 FA    =   1087 lbf
 xA   =   2 in
 MB = FA * xA  ; lbf in 
 FD    =   2864 lbf
 xD   =   2 in
 MC = FD * xD  ; lbf in 
 FC    =   4444 lbf
 DC   =   2.25 in
 TC = FC * DC / 2  ; lbf in 
 FB    =   2667 lbf
 DB   =   3.75 in
 TB = FB * DB / 2  ; lbf in

# Homework Problems:

TBD