For a body translating as well as rotating body, prove that,


1

531

August 23, 2016

Derive the relation between torque and moment of inertia


0

16987

August 19, 2016

A solid disc and ring, both of radius 10 cm are placed on a horizontal table simultaneously with initial angular speed equal to 10n rad ${{s}^{1}}$. Which of the two will start to roll earlier ? The coefficient of kinetic friction is = 0.2


0

1884

August 19, 2016

Derive an expression for K.E. of rotation


0

8197

August 19, 2016

A car weighs 1800 kg. The distance between its front and back axle is 1.8 m. Its centre of gravity is 1.05 m behind the front axle. Determine one force exerted by the level ground on each front wheel and each back wheel


0

4929

August 19, 2016

A solid sphere of mass tn and radius r is rolling on a horizontal surface. What rotation of total energy of the sphere is: Kinetic energy of rotation ? Kinetic energy of translation?


0

6454

August 19, 2016

Torques of equal magnitude are applied to a hollow cylinder and a solid sphere, both having the same mass and radius the cylinder is free to rotate about its standard axis of symmetry, and the sphere is free to rotate about an axis passing through its cen


1

5161

August 19, 2016

Find the angular speed of the door just after the bullet embedded into it


1

645

August 19, 2016

A man stands on a rotating platform, with his arms stretched horizontally holding a 5 kg weight in each hand


1

1658

August 19, 2016

A hoop is of radius 2 m weight 100 kg. It rolls along a horizontal floor so that its centre of mass has a speed of 20 cm/s. How much work has to be done to stop it?


0

3508

August 19, 2016

From a uniform disk of radius R, a circular section of radius R/2 is cut out, the centre of the hole is at R/2, from the centre of the original disc. Locate the centre of mass of the resulting flat body


0

15443

August 19, 2016

A rope of negligible mass is wound round a hollow cylinder of mass 3 kg and radius 40 cm


1

7850

August 19, 2016

A solid cylinder of mass 20 kg rotates about its axis with angular speed 100 rad ${{s}^{1}}$


1

6199

August 19, 2016

What is drop in potential energy?


1

523

August 19, 2016

What is the velocity of a body when it reaches ground after rolling down (without slipping) an inclined plane?


0

744

August 19, 2016

What is the kinetic energy of rolling?


0

1001

August 19, 2016

TWo similar bodies have same mass and same external shape. One of them is hollow. How will you find out?


0

686

August 19, 2016

Why is moment of inertia given this name?


0

529

August 19, 2016

State the factors on which moment of inertia depends


0

14179

August 19, 2016

Using the expression for power and K.E. of rotation motion, derive the relation


0

3216

August 19, 2016

(a) What is the physical significance of M.I. ? (b) Define M.I. of a body rotating about an axis


0

4757

August 19, 2016

Calculate the moment of inertia about the diameter if that of an axis perpendicular to the plane of a disc and passing through its centre is given by


0

1200

August 19, 2016

Calculate moment of inertia of a thin rod about one end


0

1081

August 19, 2016

Determine the moment of inertia of a thin ring about a tangent to the circle in the plane of the ring?


0

11455

August 19, 2016

Two solid spheres of the same mass are made of metals of different densities, which of them has larger moment of inertia about its diameter ? Why?


0

6156

August 19, 2016

A bullet of mass 10 g and speed 500 m/s is fired into a door and gets embedded exactly at the centre of the door


1

2597

August 19, 2016

Angular momentum of a system is conserved if its M.I. is changed. Is the angular K.E. also conserved?


0

446

August 19, 2016

A disc is recast into a hollow and thin cylinder of same radius. Which will have larger M.I. ? Explain


0

1980

August 19, 2016

Two solid spheres of the same mass are made of metals of different densities. Which of them has larger M.I. about a diameter?


0

558

August 19, 2016

How does the M.I. change with speed of rotation?


0

493

August 19, 2016
