A particle moves so that its position vector at time t is given by r = e cos ti + e sin tj. Show that at any time t, (a) its velocity y is inclined to the vector r at a constant angle 37/4 radians. (b) its acceleration vector is at right angles to the vector r.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter11: Topics From Analytic Geometry
Section: Chapter Questions
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A particle moves so that its position vector at time t is given by
r = e cos ti + e sin tj.
Show that at any time t,
(a) its velocity v is inclined to the vector r at a constant angle 37/4
radians.
(b) its acceleration vector is at right angles to the vector r.
Transcribed Image Text:A particle moves so that its position vector at time t is given by r = e cos ti + e sin tj. Show that at any time t, (a) its velocity v is inclined to the vector r at a constant angle 37/4 radians. (b) its acceleration vector is at right angles to the vector r.
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