If $\theta$ is angle between the velocity and acceleration of a particle moving on a circular path with decreasing speed, then .........
$\theta=90^{\circ}$
$0^{\circ} < \theta < 90^{\circ}$
$90^{\circ} < \theta < 180^{\circ}$
$0^{\circ} \leq \theta \leq 180^{\circ}$
A particle moves in $x-y$ plane according to rule $x = {\rm{asin}}\omega t$ and $\;y = {\rm{acos}}\omega t$. The particle follows
A tachometer is a device to measure
A particle of mass ${m}$ is suspended from a ceiling through a string of length $L$. The particle moves in a horizontal circle of radius $r$ such that ${r}=\frac{{L}}{\sqrt{2}}$. The speed of particle will be:
Two particles $A$ and $B$ start at the origin $O$ and travel in opposite directions along the circular path at constant speeds $0.5\,m/s$ and $1.5\,m/s$ , respectively. The time when they collide with each other ........ $\sec$
An aeroplane is flying with a uniform speed of $100\, m/s$ along a circular path of radius $100 m$. the angular speed of the aeroplane will be ......... $rad/sec$