If $\theta$ is angle between the velocity and acceleration of a particle moving on a circular path with decreasing speed, then .........
$\theta=90^{\circ}$
$0^{\circ} < \theta < 90^{\circ}$
$90^{\circ} < \theta < 180^{\circ}$
$0^{\circ} \leq \theta \leq 180^{\circ}$
The angular speed of a fly wheel making $120$ revolutions/minute is
A smooth wire of length $2\pi r$ is bent into a circle and kept in a vertical plane. A bead can slide smoothly on the wire. When the circle is rotating with angular speed $\omega$ about the vertical diameter $AB$, as shown in figure, the bead is at rest with respect to the circular ring at position $P$ as shown. Then the value of $\omega^2$ is equal to
An athlete completes one round of a circular track of radius $10\, m$ in $40\, sec$. The distance covered by him in $2 \,min$ $20 \,sec$ is ........ $m$
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 ......... $rad/sec$
A scooter is going round a circular road of radius $100 \,m$ at a speed of $10 \,m/s$. The angular speed of the scooter will be ......... $rad/s$