The problem that follow involve straight-line motion. The time t is in seconds unless othe...

The problem that follow involve straight-line motion. The time t is in seconds unless otherwise stated.

Problem

By using Eqs. ( 13.41 ):

(a) show that the relations between the cartesian unit vectors and the unit vectors et and en are

i = cos θet, – sin θen

j = sin θet + cos θen.

(b) Show that