- #1
mech-eng
- 828
- 13
Homework Statement
the first derivative of a vector of constant magnitude is the cross product of the angular velocity
of the vector(i.e , the angular velocity of the moving coordinate system ) and the vector itself.)
Homework Equations
di/dt= w x i , here w is the angular velocity and x is the cross product symbol
The Attempt at a Solution
dİ/dt=di/dΘ * dΘ/dt because i(unit vector in the direction i) is changing only in direction i.e it is
rotating, only it's direction will change.its direction changes with Θ(the angle) and Θ changes with
with the time. so there must be a chain rule. but I can't show that di/dt=wxi