A pendulum is swinging in an elevator. Its period will be greatest when elevator is

English

Gujarati

Hindi

13.Oscillations

medium

A pendulum is swinging in an elevator. Its period will be greatest when the elevator is

moving upwards at constant speed

moving downwards

moving downwards at constant speed

accelerating downwards

(AIIMS-2010)

Solution

Time period of a simple pendulum is given by

$T=2 \pi \sqrt{\frac{l}{g}}$ or $T \propto \sqrt{\frac{l}{g}}$

when the elevator is accelerating downwards, the net gravitational acceleration is $(g-a),$ so, the time period when elevation is accelerating downwards, is greatest.

Standard 11

Physics

A pendulum bob is swinging in a vertical plane such that its angular amplitude is less than $90^o$. At its highest point, the string is cut. Which trajectory is possible for the bob afterwards.

hard

A bob of mass $0.1\; kg$ hung from the celling of a room by a string $2 \;m$ long is set into oscillation. The speed of the bob at its mean position is $1\; m s ^{-1}$. What is the trajectory of the bob if the string is cut when the bob is
$(a) $ at one of its extreme positions,
$(b)$ at its mean position.

medium

In an experiment to determine the period of a simple pendulum of length $1\, m$, it is attached to different spherical bobs of radii $r_1$ and $r_2$ . The two spherical bobs have uniform mass distribution. If the relative difference in the periods, is found to be $5\times10^{-4}\, s$, the difference in radii, $\left| {{r_1} – {r_2}} \right|$ is best given by …. $cm$

hard

(JEE MAIN-2017)

A lift is descending with acceleration $g/3$ . What will be the time period of a simple pendulum suspended from its ceiling if its time period in staionary life is $'T'$ ?

medium

A plate oscillated with time period $‘T’$. Suddenly, another plate put on the first plate, then time period

easy

A pendulum is swinging in an elevator. Its period will be greatest when the elevator is

Solution

Similar Questions

A pendulum bob is swinging in a vertical plane such that its angular amplitude is less than $90^o$. At its highest point, the string is cut. Which trajectory is possible for the bob afterwards.

A lift is descending with acceleration $g/3$ . What will be the time period of a simple pendulum suspended from its ceiling if its time period in staionary life is $'T'$ ?

A plate oscillated with time period $‘T’$. Suddenly, another plate put on the first plate, then time period

Start a Free Trial Now