The Right Hand Rule

Modified: 2007-08-25 10:23:47

Not needed if you use determinate because determinate takes care of sign.

Cross Product Right hand rule to determine Direction of result vector.

The right-hand rule works as follows: Place your right-hand flat along the first of the two vectors with the palm facing the second vector and your thumb sticking out perpendicular to your hand. Then proceed to curl your hand towards the second vector. The direction that your thumb points is the direction that cross-product vector points! Though this definition is easy to explain visualy it is slightly more complicated to calculate than the dot product. (not sure where I copied this from)

Right hand rule:

1. Right hand along A
2. Open palm toward B.
3. Thumb tells

Important Moments of Inertia

Modified: 2007-08-25 10:26:10

I(end of rod) = (1/3)mR^2

I(hollw cylinder and point mass) = mR^2

Dot Product and Angles

Modified: 2008-03-11 10:52:58

Dot product:

A^*B^ = |A|*|B|cos(@) (smallest angle between)

or AxBX + ByAy = -6.4

Learn: (I didn't, but I thought I needed to)

sin(a +b) = sin(a)*cos(b) + cos(a)*sin(b)

cos(a+b) = cos(a)*cos(b) - sin(a)*sin(b)

sin(A + A) = 2*sin(a)*cos(a)

Don't solve for v=0 at .5t, solve for y=0

Angle of launch: tan^-1(Voy/Vox) = angle