|
For a body translating as well as rotating body, prove that,
|
|
1
|
441
|
August 23, 2016
|
|
Derive the relation between torque and moment of inertia
|
|
0
|
16223
|
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
|
1627
|
August 19, 2016
|
|
Derive an expression for K.E. of rotation
|
|
0
|
7691
|
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
|
4452
|
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
|
5748
|
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
|
4858
|
August 19, 2016
|
|
Find the angular speed of the door just after the bullet embedded into it
|
|
1
|
546
|
August 19, 2016
|
|
A man stands on a rotating platform, with his arms stretched horizontally holding a 5 kg weight in each hand
|
|
1
|
1425
|
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
|
3223
|
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
|
14605
|
August 19, 2016
|
|
A rope of negligible mass is wound round a hollow cylinder of mass 3 kg and radius 40 cm
|
|
1
|
7348
|
August 19, 2016
|
|
A solid cylinder of mass 20 kg rotates about its axis with angular speed 100 rad ${{s}^{-1}}$
|
|
1
|
5830
|
August 19, 2016
|
|
What is drop in potential energy?
|
|
1
|
432
|
August 19, 2016
|
|
What is the velocity of a body when it reaches ground after rolling down (without slipping) an inclined plane?
|
|
0
|
622
|
August 19, 2016
|
|
What is the kinetic energy of rolling?
|
|
0
|
876
|
August 19, 2016
|
|
TWo similar bodies have same mass and same external shape. One of them is hollow. How will you find out?
|
|
0
|
584
|
August 19, 2016
|
|
Why is moment of inertia given this name?
|
|
0
|
453
|
August 19, 2016
|
|
State the factors on which moment of inertia depends
|
|
0
|
14075
|
August 19, 2016
|
|
Using the expression for power and K.E. of rotation motion, derive the relation
|
|
0
|
2724
|
August 19, 2016
|
|
(a) What is the physical significance of M.I. ? (b) Define M.I. of a body rotating about an axis
|
|
0
|
4616
|
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
|
997
|
August 19, 2016
|
|
Calculate moment of inertia of a thin rod about one end
|
|
0
|
780
|
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
|
11222
|
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
|
5988
|
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
|
2318
|
August 19, 2016
|
|
Angular momentum of a system is conserved if its M.I. is changed. Is the angular K.E. also conserved?
|
|
0
|
386
|
August 19, 2016
|
|
A disc is recast into a hollow and thin cylinder of same radius. Which will have larger M.I. ? Explain
|
|
0
|
1869
|
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
|
498
|
August 19, 2016
|
|
How does the M.I. change with speed of rotation?
|
|
0
|
412
|
August 19, 2016
|