(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A particle moves so that its position vector r at the time t is given by

[tex]r=s(\cos \omega t \theta+\sin \omega t j)[/tex] with s and omega as constants. (j is meant to be a vector here)

(1)Show that the acceleration of the particle is [tex]-\omega r^2 [/tex].

(2) Show that the acceleration of the particle is perpendicular to its velocity.

2. Relevant equations

3. The attempt at a solution

(1) To find the acceleration vector, i guess i will need to differentiate the position vector twice. But i am not sure how to differentiate that.

r=s cos omega t theta + s sin omega tj

i don see any i vectors here ?

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# Homework Help: Vector problem

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