Question

Lustration 8 A particle moves so that its position vector varies with time as vector r
$a \cos( \alpha ) + a \ \sin ( \alpha )$
on x axis and y axis
. Find the
(a) initial velocity of the particle,
(b) angle between the position vector and velocity of the particle at any time and
(c) speed at any instant.​

Answer 1

ok,

done

see in attachments.