A particle moves on
xy
plane according to equations:
x(t)=2t^(3)-3t;,y(t)=t^(2)+4
(Take
g=10(m)/(s^(2))
. Please mark the closest answer as correct answer ) Find at what time, direction of the motion of the particle is parallel to
y
axis (a)
(2)/(\sqrt(2))s
(b)
(1)/(\sqrt(2))s
(c)
\sqrt(2)s
( d) 0.5 s (e) 4 s