✕
  1. Tardigrade
  2. Question
  3. Physics
  4. Moment of inertia of a uniform hexagonal plate about an axis L L' is ' I prime as shown in the figure-5.117. The moment of inertia (about axis X X ) of an equilateral uniform triangular plate of thickness double that of the hexagonal plate is (Ratio of specific gravity (ρt/ρh)=3 ):

Q. Moment of inertia of a uniform hexagonal plate about an axis ' is ' as shown in the figure-. The moment of inertia (about axis ) of an equilateral uniform triangular plate of thickness double that of the hexagonal plate is (Ratio of specific gravity ):

System of Particles and Rotational Motion Report Error

Solution:


We divide hexgon in six equilateral triangles by dotted lines as shown in figure and added two more triangles to it to form a diamond. If moment of inertia of triangle about is then we use



Now as density of triangular plate is 3 times and thickness is double its moment of inertia will be

Questions from System of Particles and Rotational Motion

1. A disc is rolling, the velocity of its centre of mass is . Which one of these will be correct ?

AIPMT 2001

2. The centre of mass of a system of three particles of masses and is taken as the origin of a coordinate system. The position vector of a fourth particle of mass such that the centre of mass of the four particle system lies at the point is a , where a is a constant. The value of is

3. Two particles of equal mass have velocities and . First particles has an acceleration while the acceleration of the other particle is zero. The centre of mass of the two particles moves in a path of

4. What is the torque of a force about the origin, if the force acts on a particle whose position vector is ?

J & K CET 2014

5. The angular velocity of a body is and a torque acts on it. The rotational power will be

NTA Abhyas 2020

Physics Most Viewed Questions

1. If and respectively denote energy and gravitational constant, then has the dimensions of:

NEET 2021 Physical World, Units and Measurements

2. The de Broglie wavelength of an electron moving with kinetic energy of is nearly

NEET 2020 Dual Nature of Radiation and Matter

3. A car starts from rest and accelerates at At , a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at ? (Take

NEET 2021 Motion in a Straight Line

4. A wheel with metallic spokes each long is rotated with a speed of in a plane perpendicular to a magnetic field of . The induced emf between the axle and rim of the wheel will be,

NEET 2020 Electromagnetic Induction

5. A barometer is constructed using a liquid (density What would be the height of the liquid column, when a mercury barometer reads ?
(density of mercury

NEET 2020 Mechanical Properties of Fluids

Latest Updates