Embibe Experts Solutions for Chapter: Rotational Mechanics, Exercise 1: JKCET 2018

The moment of inertia of a circular ring of radius $R$ and mass $M$ about its diameter is

A uniform bar of mass M and length L is bent in the form of an equilateral triangle. Find the moment of inertia of the triangle about an axis passing through the centre of mass and perpendicular to the plane of the triangle.

What is the moment of inertia of a ring about a tangent to the circle in the plane of a ring?$$

A body of mass $5 \mathrm{kg}$ acquires an angular acceleration of $10 \mathrm{rad} {\mathrm{s}}^{-2}$ by an applied torque of $2 \mathrm{N} \mathrm{m}$. Find its radius of gyration.

A solid cylinder of mass $\mathrm{M}$ and radius $\mathrm{R}$ rolls on a flat surface. Find its moment of inertia about the line of contact.

The dimensional formula$\left[{\mathrm{ML}}^2{ \mathrm{T}}^{-2}\right]$represents

Why there are two propellers in a helicopter?