Physics-

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A uniform rod of mass M and length L lies radially on a disc rotating with angular speed w in a horizontal plane about its axis. The rod does not slip on the disc and the centre of the rod is at a distance R from the centre of the disc. Then the kinetic energy of the rod is-

$\frac{1}{2} m ω^{2} (R^{2} + \frac{L^{2}}{12})$
$\frac{1}{2} m ω^{2} R^{2}$
$\frac{1}{24} m ω^{2} L^{2}$
None of these

The correct answer is: $fraction numerator 1 over denominator 2 end fraction m omega to the power of 2 end exponent open parentheses R to the power of 2 end exponent plus fraction numerator L to the power of 2 end exponent over denominator 12 end fraction close parentheses$

A uniform rod AB of mass m and length $l$ at rest on a smooth horizontal surface. An impulse P is applied to the end B. The time taken by the rod to turn through a right angle is :-

physics-General

General

physics-

A thin rod of length 4 $l$ , mass 4m is bent at the points as shown in the fig. What is the moment of inertia of the rod about the axis passing point O & perpendicular to the plane of the paper

physics-General

General

physics-

A smooth tube of certain mass is rotated in gravity free space and released. The two balls shown in the figure move towards ends of the tube. For the whole system which of the following quantity is not conserved :-

physics-General

General

physics-

A solid sphere is rolling on a frictionless surface, shown in figure with a translational velocity v m/s. If it is to climb the inclined surface then v should be:

physics-General

General

physics-

A rod hinged at one end is released from the horizontal position as shown in the figure. When it becomes vertical its lower half separates without exerting any reaction at the breaking point. Then the maximum angle ' ' q made by the hinged upper half with the vertical is

physics-General

General

physics-

A disc of mass M and radius R rolls on a horizontal surface and then rolls up an inclined plane as shown in the figure. If the velocity of the disc is v, the height to which the disc will rise will be :–

physics-General

General

chemistry-

The reaction of with HBr gives

chemistry-General

General

The line parallel to the x-axis and passing through the intersection of the lines $a x plus 2 b y plus 3 b equals 0 times text and end text times b x minus 2 a y minus 3 a equals 0$ where $left parenthesis a comma b right parenthesis not equal to left parenthesis 0 comma 0 right parenthesis$ is

In this question, we have to find the lines where it lies and what’s its distance from x-axis. If u=ax1+by1+c1=0 and v=ax2+by2+c2=0 are two intersecting lines, then the equation u + kv =0 represents a family of lines. Remember the family of lines

The line parallel to the x-axis and passing through the intersection of the lines $a x plus 2 b y plus 3 b equals 0 times text and end text times b x minus 2 a y minus 3 a equals 0$ where $left parenthesis a comma b right parenthesis not equal to left parenthesis 0 comma 0 right parenthesis$ is

GeneralGeneral

General

maths-

Distance between the two parallel lines $y equals 2 x plus 7$ and $y equals 2 x plus 5$ is

maths-General

General

chemistry-

When propionic acid is treated with aqueous sodium bicarbonate is liberated. The ‘C’ of CO₂ comes from

chemistry-General

General

chemistry-

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A uniform rod of mass M and length L lies radially on a disc rotating with angular speed w in a horizontal plane about its axis. The rod does not slip on the disc and the centre of the rod is at a distance R from the centre of the disc. Then the kinetic energy of the rod is-

None of these

The correct answer is:

Related Questions to study

A uniform rod AB of mass m and length at rest on a smooth horizontal surface. An impulse P is applied to the end B. The time taken by the rod to turn through a right angle is :-

A uniform rod AB of mass m and length at rest on a smooth horizontal surface. An impulse P is applied to the end B. The time taken by the rod to turn through a right angle is :-

A thin rod of length 4, mass 4m is bent at the points as shown in the fig. What is the moment of inertia of the rod about the axis passing point O & perpendicular to the plane of the paper

A thin rod of length 4, mass 4m is bent at the points as shown in the fig. What is the moment of inertia of the rod about the axis passing point O & perpendicular to the plane of the paper

A smooth tube of certain mass is rotated in gravity free space and released. The two balls shown in the figure move towards ends of the tube. For the whole system which of the following quantity is not conserved :-

A smooth tube of certain mass is rotated in gravity free space and released. The two balls shown in the figure move towards ends of the tube. For the whole system which of the following quantity is not conserved :-

A solid sphere is rolling on a frictionless surface, shown in figure with a translational velocity v m/s. If it is to climb the inclined surface then v should be:

A solid sphere is rolling on a frictionless surface, shown in figure with a translational velocity v m/s. If it is to climb the inclined surface then v should be:

A rod hinged at one end is released from the horizontal position as shown in the figure. When it becomes vertical its lower half separates without exerting any reaction at the breaking point. Then the maximum angle ' ' q made by the hinged upper half with the vertical is

A rod hinged at one end is released from the horizontal position as shown in the figure. When it becomes vertical its lower half separates without exerting any reaction at the breaking point. Then the maximum angle ' ' q made by the hinged upper half with the vertical is

A disc of mass M and radius R rolls on a horizontal surface and then rolls up an inclined plane as shown in the figure. If the velocity of the disc is v, the height to which the disc will rise will be :–

A disc of mass M and radius R rolls on a horizontal surface and then rolls up an inclined plane as shown in the figure. If the velocity of the disc is v, the height to which the disc will rise will be :–

The reaction of with HBr gives

The reaction of with HBr gives

The line parallel to the x-axis and passing through the intersection of the lines where is

The line parallel to the x-axis and passing through the intersection of the lines where is

Distance between the two parallel lines and is

Distance between the two parallel lines and is

When propionic acid is treated with aqueous sodium bicarbonate is liberated. The ‘C’ of CO2 comes from

When propionic acid is treated with aqueous sodium bicarbonate is liberated. The ‘C’ of CO2 comes from

The following compound is used as

The following compound is used as

In the reaction, product P is

In the reaction, product P is

The compound X in the reaction is

The compound X in the reaction is

The major organic product formed from the following reaction

The major organic product formed from the following reaction

The compound (X) is

The compound (X) is

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$\frac{1}{2} m ω^{2} (R^{2} + \frac{L^{2}}{12})$
$\frac{1}{2} m ω^{2} R^{2}$
$\frac{1}{24} m ω^{2} L^{2}$
None of these

The correct answer is: $fraction numerator 1 over denominator 2 end fraction m omega to the power of 2 end exponent open parentheses R to the power of 2 end exponent plus fraction numerator L to the power of 2 end exponent over denominator 12 end fraction close parentheses$

A uniform rod AB of mass m and length $l$ at rest on a smooth horizontal surface. An impulse P is applied to the end B. The time taken by the rod to turn through a right angle is :-

A uniform rod AB of mass m and length $l$ at rest on a smooth horizontal surface. An impulse P is applied to the end B. The time taken by the rod to turn through a right angle is :-

A thin rod of length 4 $l$ , mass 4m is bent at the points as shown in the fig. What is the moment of inertia of the rod about the axis passing point O & perpendicular to the plane of the paper

A thin rod of length 4 $l$ , mass 4m is bent at the points as shown in the fig. What is the moment of inertia of the rod about the axis passing point O & perpendicular to the plane of the paper

The line parallel to the x-axis and passing through the intersection of the lines $a x plus 2 b y plus 3 b equals 0 times text and end text times b x minus 2 a y minus 3 a equals 0$ where $left parenthesis a comma b right parenthesis not equal to left parenthesis 0 comma 0 right parenthesis$ is

The line parallel to the x-axis and passing through the intersection of the lines $a x plus 2 b y plus 3 b equals 0 times text and end text times b x minus 2 a y minus 3 a equals 0$ where $left parenthesis a comma b right parenthesis not equal to left parenthesis 0 comma 0 right parenthesis$ is

Distance between the two parallel lines $y equals 2 x plus 7$ and $y equals 2 x plus 5$ is

Distance between the two parallel lines $y equals 2 x plus 7$ and $y equals 2 x plus 5$ is

When propionic acid is treated with aqueous sodium bicarbonate is liberated. The ‘C’ of CO₂ comes from

When propionic acid is treated with aqueous sodium bicarbonate is liberated. The ‘C’ of CO₂ comes from

The compound X in the reaction
is

The compound X in the reaction
is