A body tied with string revolves uniformly in a circle. How does the angular momentum of the body change from its initial value if the string is cut suddenly?

Q. One end of a string of length $1.0m$ is tied to a body of mass $0.5kg$. It is whirled in a vertical circle with angular velocity $4rad/s$. The tension in the string when body is at the lower most point of its motion is equal to [Take $g=10m/s^2$].

Q. A body of mass $2kg$ is tied at one end of a string $1m$ long. The other end is fixed and the body revolves in a horizontal circle. The maximum tension in a horizontal circle. The maximum tension which the string can withstand is $2000N$. Calculate the maximum number of revolutions per minute the body will make and its linear velocity when the string just breaks

Q. If the Kinetic energy of a moving body becomes four times its initial Kinetic energy, then the percentage change in its momentum will be :

Q. Assertion :When a body is moving uniformly in a circle, its momentum goes on changing continuously but its kinetic energy remains constant. Reason: Momentum $p=mv$ but K.E.=$0.5m{v}^2$. In uniform circular motion $v$ changes but $v^2$ does not change.

Q. If the KE of a body becomes four times of its initial value, then the new momentum will be more than its initial momentum by: