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A disc can roll without slipping , with out applying any external force on a <br> 1) rough inclined plane <br> 2) smooth inclined plane <br> 3) rough horizontal surface <br> 4) smooth horizontal surface
jeemain
physics
class11
unit5
rotational-motion
translation-and-rotation
easy
asked
Nov 29, 2013
by
meena.p
1
answer
A thin string is wrapped several times around a cylinder kept on a rough horizontal surface. A boy standing at a distance l from the cylinder draws the string towards him as shown. The cylinder rolls without slipping . The length of the string passed through the hand of the boy while the cylinder reaches his hand is
jeemain
physics
class11
unit5
rotational-motion
translation-and-rotation
easy
asked
Nov 29, 2013
by
meena.p
1
answer
Consider a disc rolling with out slipping on a horizontal surface at a speed V as shown in figure.<br> 1) the speed of the particle at A is 2V. <br> 2) the speed of the particle and B,C and D is equal to V <br> 3) The speed of C is zero and the speed of B is $\sqrt 2$ V <br> 4) the speed of 0 is less then the speed of V which is the correct answer?
jeemain
physics
class11
unit5
rotational-motion
translation-and-rotation
easy
asked
Nov 29, 2013
by
meena.p
1
answer
In a GP, given that the first term is $ 312 ½ $ and the common ratio is $ 1/2 $ find the sum of the terms of the series to infinity.
jeemain
math
class11
unit7
sequences-and-series
medium
asked
Nov 28, 2013
by
harini.tutor
1
answer
The value of $a$ for which the volume of the parallelopiped formed by the vectors $\hat i+a\hat j+\hat k,\:\:\hat j+a\hat k,\:\:a\hat i+\hat k$ is minimum is ?
jeemain
math
class12
ch10
vector-algebra
medium
vector-product
q62
asked
Nov 28, 2013
by
rvidyagovindarajan_1
1
answer
When $SiO_2$ is beated with C in an electric formula
jeemain
chemistry
unit15
p-block-elements
q73
difficult
asked
Nov 28, 2013
by
sreemathi.v
1
answer
If $\overrightarrow u=\hat i+\hat j,\:\overrightarrow v=\hat i-\hat j\:\:and\:\:\overrightarrow w=\hat i+2\hat j+3\hat k$. and if $\hat n$ is a unit vector such that $\overrightarrow u.\hat n=\overrightarrow v.\hat n=0$, then $|\overrightarrow w.\hat n|=?$
jeemain
math
class12
ch10
vector-algebra
medium
addition-of-vectors
q61
asked
Nov 28, 2013
by
rvidyagovindarajan_1
1
answer
Quartz is form of
jeemain
chemistry
unit15
p-block-elements
q72
difficult
asked
Nov 28, 2013
by
sreemathi.v
1
answer
Angular momentum of the particle rotating with a central force is constant due to
jeemain
physics
class11
unit5
rotational-motion
angular-momentum-conservation
easy
asked
Nov 28, 2013
by
meena.p
1
answer
A conical pendulum consists of a simple pendulum moving in a horizontal circle as shown. $C$ is the pivot. $0$ is the centre of the circle in which the pendulum bob moves and w the constant angular velocity of the bob. If $\overrightarrow {L} $ is the angular momentum about the axis $C_0$, then
jeemain
physics
class11
unit5
rotational-motion
angular-momentum-conservation
easy
asked
Nov 28, 2013
by
meena.p
1
answer
A conical pendulum consists of a simple pendulum moving in a horizontal circle as shown. C is the pivot. O is the centre of the circle in which the pendulum bob moves and w the constant angular velocity of the bob. If $\overrightarrow {L} $ is the angular momentum about C, then
jeemain
physics
class11
unit5
rotational-motion
angular-momentum-conservation
easy
asked
Nov 28, 2013
by
meena.p
1
answer
The formulae of ferric alum
jeemain
chemistry
unit15
p-block-elements
q71
difficult
asked
Nov 28, 2013
by
sreemathi.v
1
answer
$B_2H_6+HCl\overset{catalyst}{\rightarrow}B_2H_5Cl+H_2\uparrow$.The catalyst is
jeemain
chemistry
unit15
p-block-elements
q70
difficult
asked
Nov 28, 2013
by
sreemathi.v
1
answer
If the resultant of all external forces acting on a system of particles is zero, then from an inertial frame, one can surely say that
jeemain
physics
class11
unit5
rotational-motion
angular-momentum-conservation
medium
asked
Nov 28, 2013
by
meena.p
1
answer
A kid of mass M stands at the edge of a platform of radius r which can freely rotate about its axis. The moment of inertia of platform is I. The system is at rest when a friend throws a ball of mass m and the kid catches it. If the velocity of the ball is v horizontally along the tangent to the edge of the platform when it was caught by the kid, find the angular speed of the platform after the event.
jeemain
physics
class11
unit5
rotational-motion
angular-momentum-conservation
medium
mock
asked
Nov 28, 2013
by
meena.p
1
answer
When $B_2H_6$ reacts with $H_2O$ or alkalies and produces $x+y$ is liberated.The $y$ liberated is
jeemain
chemistry
unit15
p-block-elements
q69
difficult
asked
Nov 28, 2013
by
sreemathi.v
1
answer
In the given figure , a ball strikes a rod elastically and the rod is hinged at point A. Then which of the statements is / are correct ?
jeemain
physics
class11
unit5
rotational-motion
angular-momentum-conservation
medium
asked
Nov 28, 2013
by
meena.p
1
answer
In the absence of external force acting n a rigid system, which of the following must remain constant 1) angular momentum 2) linear momentum 3) moment of inertia 4) kinetic energy Which one is the correct answer ?
jeemain
physics
class11
unit5
rotational-motion
angular-momentum-conservation
easy
asked
Nov 28, 2013
by
meena.p
1
answer
When $B_2H_6$ reacts with $H_2O$ or alkalies and produces $x+y$ is liberated.The $x$ is
jeemain
chemistry
unit15
p-block-elements
q68
difficult
asked
Nov 28, 2013
by
sreemathi.v
1
answer
A boy sitting over a rotating stool has his arms folded. If he stretches his arms, his angular momentum about the axis of rotation
jeemain
physics
class11
unit5
rotational-motion
angular-momentum-conservation
medium
asked
Nov 28, 2013
by
meena.p
1
answer
A uniform thin circular ring of mass M and radius R is rotating about its fixed axis passing through its centre, perpendicular to its plane of rotation with constant angular velocity w. Two objects each of mass m are gently attached to the opposite ends of the diameter of the ring. The ring now rotates with an angular velocity
jeemain
physics
class11
unit5
rotational-motion
angular-momentum-conservation
medium
asked
Nov 28, 2013
by
meena.p
1
answer
Borazole is also known as
jeemain
chemistry
unit15
p-block-elements
q67
difficult
asked
Nov 28, 2013
by
sreemathi.v
1
answer
There are how many Boron atoms in metaborate ion?
jeemain
chemistry
ch11
class11
cbse
p-block-elements
q66
difficult
group-13
boron-family
inorganic-chemistry
asked
Nov 28, 2013
by
sreemathi.v
1
answer
The colour of cobalt metaborate is
jeemain
chemistry
unit15
p-block-elements
q65
difficult
asked
Nov 28, 2013
by
sreemathi.v
1
answer
$CoSO_4+B_2O_3\rightarrow$(Bead).From this equation the Bead is
jeemain
chemistry
unit15
p-block-elements
q64
difficult
asked
Nov 28, 2013
by
sreemathi.v
1
answer
Refer to the below equation :
jeemain
chemistry
unit15
p-block-elements
q63
difficult
asked
Nov 28, 2013
by
sreemathi.v
1
answer
Refer to the below equation :
jeemain
chemistry
unit15
p-block-elements
q62
difficult
asked
Nov 28, 2013
by
sreemathi.v
1
answer
$5H_2O+NaB_4O_7+2HCl\rightarrow 2NaCl+x$. In this equation the $x$ is
jeemain
chemistry
unit15
p-block-elements
q61
difficult
asked
Nov 28, 2013
by
sreemathi.v
1
answer
$HBr$ is weaker acid than HI due to
jeemain
chemistry
unit15
p-block-elements
q60
sec-a
medium
asked
Nov 28, 2013
by
sreemathi.v
1
answer
The reactivity $Na_2O$ going to $K_2O$
jeemain
chemistry
unit15
p-block-elements
q59
medium
asked
Nov 28, 2013
by
sreemathi.v
1
answer
Silicon belongs to which category?
jeemain
chemistry
unit15
p-block-elements
q58
medium
asked
Nov 28, 2013
by
sreemathi.v
1
answer
Each carbon in diamond is __________ hybridization
jeemain
chemistry
unit15
p-block-elements
q57
medium
asked
Nov 28, 2013
by
sreemathi.v
1
answer
Oxygen belongs to which category?
jeemain
chemistry
unit15
p-block-elements
q56
medium
asked
Nov 28, 2013
by
sreemathi.v
1
answer
The stability of which is correct ?
jeemain
chemistry
unit15
p-block-elements
q55
medium
asked
Nov 28, 2013
by
sreemathi.v
1
answer
Flurine forms how many salts with xenon?
jeemain
chemistry
unit15
p-block-elements
q54
medium
asked
Nov 28, 2013
by
sreemathi.v
1
answer
Graphite's lubricant nature in moon
jeemain
chemistry
unit15
p-block-elements
q53
medium
asked
Nov 28, 2013
by
sreemathi.v
1
answer
With excess of $Cl_2$ ammonia forms
jeemain
chemistry
unit15
p-block-elements
q52
medium
asked
Nov 28, 2013
by
sreemathi.v
1
answer
A particle performs uniform circular motion with angular momentum L. If the frequency of particles motion is doubled and its kinetic energy is halved, the angular momentum becomes
jeemain
physics
class11
unit5
rotational-motion
angular-momentum
medium
asked
Nov 28, 2013
by
meena.p
0
answers
A conical pendulum consists of a simple pendulum moving in a horizontal circle as shown. C is the pivot . O is the circle in which the pendulum moves.and $w_1$ the angular velocity of the bob. If L is the angular momentum about C, then
jeemain
physics
class11
unit5
rotational-motion
angular-momentum
easy
asked
Nov 28, 2013
by
meena.p
1
answer
$H_2B_4O+5H_2O\rightarrow x$. $x$ is
jeemain
chemistry
unit15
p-block-elements
q51
medium
asked
Nov 28, 2013
by
sreemathi.v
1
answer
Hydrolysis of chloroform with aqueous KOH gives
jeemain
chemistry
unit15
p-block-elements
q50
medium
asked
Nov 28, 2013
by
sreemathi.v
1
answer
Which of the following doesn't participate in the solvay's process for manufacture of $Na_2CO_3$
jeemain
chemistry
unit15
p-block-elements
q49
medium
sec-a
asked
Nov 28, 2013
by
sreemathi.v
1
answer
Silica is soluble in
jeemain
chemistry
unit15
p-block-elements
q48
medium
asked
Nov 28, 2013
by
sreemathi.v
1
answer
The element which can displace 3 other halogens from their compounds
jeemain
chemistry
unit15
p-block-elements
q47
medium
asked
Nov 28, 2013
by
sreemathi.v
1
answer
The angular momentum of a particle about $o$ is varying as $L = 4t+8$ (SI units) . When it moves along straight line $y= x-4$(x,y in maters) . The magnitude of force acting on the particle would be
jeemain
physics
class11
unit5
rotational-motion
angular-momentum
medium
asked
Nov 28, 2013
by
meena.p
1
answer
A disc of mass M and radius R is rolling with angular speed w on a horizontal plane as shown. The magnitude of the angular momentum of the disc about the origin O is :
jeemain
physics
class11
unit5
rotational-motion
angular-momentum
medium
asked
Nov 28, 2013
by
meena.p
1
answer
Angular momentum of a particle rotating with a centre force is constant due to
jeemain
physics
class11
unit5
rotational-motion
angular-momentum
easy
asked
Nov 28, 2013
by
meena.p
1
answer
A particle is projected at time $t=0$ from a point P on the ground with a speed $V_0$ at an angle of $45^{\circ}$ to the horizontal . What is the magnitude of the angular momentum of the particle about point P at time $t= \large\frac{V_0}{g}$
jeemain
physics
class11
unit5
rotational-motion
angular-momentum
difficult
asked
Nov 28, 2013
by
meena.p
1
answer
A particle is projected at time $t=0$ from a point P on the ground with speed u at an angle $\theta$ with the horizontal. The angular momentum of the particle about the origin when it is at the maximum height
jeemain
physics
class11
unit5
rotational-motion
angular-momentum
medium
asked
Nov 28, 2013
by
meena.p
1
answer
A particle of mass 2 kg is moving along a straight line $3x+4y=5$ with speed $8 m/s$. What is the angular momentum of the particle about the orgin.
jeemain
physics
class11
unit5
rotational-motion
angular-momentum
medium
asked
Nov 28, 2013
by
meena.p
1
answer
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