Section 1.31.4: 
1)  If the vertical vector, upward pointing unit vector is denoted by e and the unit vector in the
direction of the horizontal projection of F is denoted by eŽ, then F = 12 2^{1/2} (e + eŽ). 
2)  Let e denote the unit vector in the direction of the vertical projection of F and let eŽ denote
the unit vector in that of the horizontal projection. Then, F = 5 (e + 3^{1/2} eŽ).

Sections 1.61.7: 
1)  The work is 3 as measured in the implied units. 
Sections 1.71.8: 
1)  The angular momentum vector is r x r =
(3^{1/2}/2, 0, 1) which is constant.
This means implies that the motion is in the plane where 3^{1/2} x/2 + z = 0. 
Section 5.1: 
1)  The work is 5/3 in the implied units. 
Section 2.7: 
1)  The minima is at p = 0 and = , the value there is 1. 
Section 3.4: 
1)  The total mass is 1000/3. The center of mass is (0, 0, 15/4). 
Section 5.5 
1)  The total charge is 4. 
2)  The total charge is 4/3. 