## Rotational Dynamics Multiple Choice Questions

Some multiple choice questions from rotational dynamics that includes core concept of this tipic.

## Simple harmonic multiple choice questions

Below are some simple harmonic motion conceptual questions.

## A simple pendulum with length L and mass M of the bob is vibrating with amplitude a. Then the maximum tension in the string is

For bob to move in a circular path, the tension is maximum at the lower point. (i.e. at mean position). The maximum tension on the string can be calculated as follow:

## A pendulum clock, which keeps correct time at sea level, loses 15 s per day when taken to the top of mountain. If the radius of the earth is 6400 km, the height of the mountain is:

A pendulum clock, which keeps correct time at sea level, loses 15 s per day when taken tot he top of mountain. If the radius of the earth is 6400 km, the height of the mountain is:

## Two simple pendulums of time period 2 sec and 2.1 sec are made to vibrate simultaneously. They are in phase initially. After how many vibrations they are in the same phase?

Two simple pendulums of time period 2 sec and 2.1 sec are made to vibrate simultaneously. They are in phase initially. After how many vibrations they are in the same phase?

## Types of Oscillation

Depending upon the external forces and quantities related to oscillation like time period, amplitude, etc, the oscillation can be categorized into three types. They are: Damped Oscillation Free Oscillation Forced Oscillation Damped Oscillation The type of oscillation where the amplitude and energy of oscillating particles gradually decrease with time is called damped oscillation. Due to …

## Rotational Dynamics Conceptual Questions

Rotational dynamics conceptual questions are important and gives you a lot of idea about a particular topic.

## The angular velocity of the earth around the sun increases when it comes closer to the sun. Why?

When the earth comes closer to the sun, the distance of the earth from the sun decreases, and that decreases

## If the earth is struck by meteorites, the earth will slow down slightly. Why?

When the earth is struck by meteorites, the mass of the earth increases which increases the moment of inertia of the earth as

## Why spokes are fitted in the cycle?

Q. Why spokes are fitted in the cycle? The spokes fitted in a cycle increase the moment of inertia of a wheel. From the conservation of angular momentum ( = constant), we can say the greater moment of inertia of a wheel reduces the angular velocity of a wheel proving the smooth rotation of a …