Motion in a Vertical Circle

A small sphere is attached to a cord and rotates in a vertical circle about a point $O$. If the range speed of the sphere is increased, the cord is most likely to break at the orientation when the mass is at:

A stone tied to a string is rotated in a vertical circle. The minimum speed of the stone during a complete vertical circular motion 

A smooth semicircular wire track of radius $R$ is fixed in a vertical plane One end of a massless spring of natural length  $\frac{\mathrm{}\mathrm{}\mathrm{}3R}{4}$  is attached to the lowest point $O$of the wire track. A small ring of mass $m$ which can slide on the track is attached to the other end of the spring. The ring is held stationary at point $P$ such that the spring makes an angle of  $60°$ with the vertical. The spring constant $K=\frac{mg}{R}$ . Consider the instant when the ring is released. Find the normal reaction on the ring by the track.

A small block is shot into each of the four smooth tracks as shown below. Each of the tracks rises to the same height. The speed with which the block enters the track is the same in all cases. At the highest point of the track, the normal reaction is maximum in

An iron ball and an aluminium ball of different radius are released from a height h in vaccum.What is the time taken by both of them to reach the ground?

Discuss the motion in vertical circle.

Minimum velocity required to complete vertical circle of radius$\mathrm{R}$ at lowest point is $\sqrt{5\mathrm{gR}}$.

A point mass $\mathrm{M}$ is hanging by a string of length $\mathrm{l}.$ The velocity $v$ which must be imparted to it in order for it to just barely reach the top is

A pendulum is made of a rigid rod (mass $m,$ length $l$ ) and a small bob of mass $M$ attached at one end (as shown in the figure). The rod is pivoted on the other end. What should be the minimum speed of the bob at its lowest point so that the pendulum completes a full circle ?

A pendulum string of length $𝓁$ moves up to a horizontal position as shown in figure and released.




What should be the minimum strength of the string to withstand the tension as the pendulum passes through the position of equilibrium? The mass of the pendulum is $m$.

A particle is tied to a string describes a vertical circular motion of radius $r$ continually. If it has a velocity $\sqrt{3gr}$ at the highest point, then the ratio of the respective tensions in the string holding it at the highest and lowest points is

A bucket, full of water is revolved in a vertical circle of radius $1.5 \mathrm{m}.$ The maximum time period of revolution so that the water doesn't fall out of the bucket is $\left(g\approx {\pi }^2\right)$

For vertical circular motion, if $v_{\text{lowermost point}}<\sqrt{5rg}$, then,

A particle is attached at one end of a string of length $l$ whose other end is fixed. It is moving in a circular path in the vertical plane such that at any position. The tension in the string is $T$ and the acceleration of the particle is $a$. The velocity of the particle at the lowest point is $u$. Then find the condition at which $\overrightarrow{T}·\overrightarrow{a}$ will be positive at the lowest point.

A particle is projected horizontally from the top of a smooth sphere of the radius $a$ with a velocity $u$ so that it slides down the outside of the sphere. After falling through a height of $\frac{a}{4}$, the particle leaves the sphere. Find the value of $u$.

A bob of mass $m$ of a simple pendulum of length $l$ displaced from position $O$ to $P$. $P$ is $h$ height above the position $O$. Then it is released from the position $P$. The velocity of the bob is $v$ at $O$. Find the tension in the string when the bob passes through the equilibrium position $O$ (neglect friction).

Figure shows a small ring $\mathrm{P}$ is threaded on a smooth wire bent in the form of a circle of radius $a$ and centre $\mathrm{O}$. The wire is rotating with constant angular speed $\omega$ about a vertical diameter $\mathrm{XY}$, while the ring remains at rests relative to the wire at a distance $\frac{a}{2}$ from $\mathrm{XY}$. What is the value of ${\omega }^2$ ?

A simple pendulum is made by suspending a bob with a light string. The bob is imparted a horizontal velocity such that it just completes full circular trajectory in vertical plane. What is the difference in tension between lowest and highest point of path?

 A pendulum has an angular amplitude $\theta$. Tensions in the string when the pendulum is at the extreme position and at the bottom are $T_1$ and $T_2$ respectively. If $T_2=2T_1$ , then $\theta$ is equal to :-