CBSE > Class 11 > Physics | CBSE Board | Homework Help

Inertia of a body is the measure of the body's resistance towards its own acceleration. Thus mass becomes a qualitative measureof its inertia.
Mass is scalar, thus linear inertia is scalar.
Rotational Inertia or Moment of Inertia is given by I = MR² , It is a tensor that means it is neither a scalar nor is a vector.

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Friction

Posted by Kuljit Singh 7 years ago

CBSE > Class 11 > Physics

1 answers

Sivan Karthick 7 years ago

it is an opposing force acts always opposite to the direction of force applied between two layers

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Can anyone explain me about poisson's ratio

Posted by @@Ditya ®°@Thore????? 7 years ago

CBSE > Class 11 > Physics

3 answers

Priya Dharshini ☺☺ 7 years ago

Lateral strain/longitudinal strain. As u know when u are pulling an object there would be a change in diameter also and length hence it is deltaD/D÷deltaL/L Poissons ratio is between 0-0.5 only

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?Ahista Mishra? 7 years ago

Within the elastic limit, the ratio of the lateral strain to the longitudinal strain is called Poisson's Ratio. It is denoted by (sigma). And the value of Sigma lies between - 1and 0.5. ???

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Methran Gs 5 years, 8 months ago

Kill yourself

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What is the moment of inertia of an uniform triangle about any edge ??

Posted by Abhay Pandey 7 years ago

CBSE > Class 11 > Physics

0 answers

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Show that â.(bXc) is equal in magnitude to the volume of the parallelopiped formed on the three vactors â,b,c.

Posted by Om Wadolkar 7 years ago

CBSE > Class 11 > Physics

0 answers

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Calculate the r.m.s. velocity of air molecules at S.T.P. given that the density of air at S.T.P. is 1.296 per kg cube.

Posted by Ishita Ishita 7 years ago

CBSE > Class 11 > Physics

6 answers

Ankit Singh 7 years ago

???ishita

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Ishita Ishita 7 years ago

Its ok Ankit??

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Ankit Singh 7 years ago

Sorry Ishita i have not read this chapter?????

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Ishita Ishita 7 years ago

Its from Behaviour of Perfect Gas and Kinetic Theory

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Sivan Karthick 7 years ago

r/r=square root of d /d=1.2916/225approximately =1.01

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Ankit Singh 7 years ago

Ishita which chapter is this

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What is SHM ? Explain in brief

Posted by Ankit Singh 7 years ago

CBSE > Class 11 > Physics

6 answers

Muskan ???? 7 years ago

Simple harmonic motion

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Ankit Singh 7 years ago

Thanks priya and Ayushi

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Priya Dharshini ☺☺ 7 years ago

harmonic motion of constant amplitude in which the acceleration is proportional and oppositely directed to the displacement of the body from a position of equilibrium :- the projection on any diameter of a point in uniform motion around a circle.

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Ayushi Ayushi 7 years ago

The classic example of this is a mass on a spring, because the more the mass stretches it, the more it feels a tug back towards the middle. A mass on a spring can be vertical, in which case gravity is involved, or horizontal on a smooth tabletop. If you imagine pulling a mass on a spring and then letting go, it will bounce back and forth around an equilibrium position in the middle. Like with all simple harmonic motion, the velocity will be greatest in the middle, whereas the restoring force (and therefore acceleration) will be greatest at the outside edges (at the maximum displacement). Another example of simple harmonic motion is a pendulum, though only if it swings at small angles.

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Ayushi Ayushi 7 years ago

In mechanics and physics, simple harmonic motion is a special type of periodic motion or oscillation motion where the restoring force is directly proportional to the displacement and acts in the direction opposite to that of displacement.

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Ankit Singh 7 years ago

Please answer this question

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Defrence between G and g

Posted by Vinaypratap Singh Rathod 7 years ago

CBSE > Class 11 > Physics

2 answers

Muskan ???? 7 years ago

G is gravitational constant whose value is 6.67×10to the power -11 whereas gis the acceleration due to gravity whose value is 9.8m/s

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Aditi Mittal 7 years ago

G=gravitational constant, g=acceleration due to gravity

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Define stress

Posted by Gaurav Sah 7 years ago

CBSE > Class 11 > Physics

4 answers

Muskan ???? 7 years ago

Stress is force by area

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Harsh Mishra 7 years ago

Stress is similar to Strain. For Example : I strains my ear ? to listen carefully that what my elders are saying because I am ? taking these days a lot of stress.

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Saba Elias 7 years ago

Stress is defined as internal porperty of material which resist external loading

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Aditi Mittal 7 years ago

Force/Area

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Name the largest and the smallest practical unit of energy.

Posted by Ishita Ishita 7 years ago

CBSE > Class 11 > Physics

5 answers

Ayushi Ayushi 7 years ago

Your wellcome. Ishita

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Ankit Singh 7 years ago

Yours welcome. Ishita

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Ishita Ishita 7 years ago

Thnks 2 both of u

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Ankit Singh 7 years ago

The smallest practical unit of energy is "JOULE" The largest practical unit of energy is " KILO WATT -HOUR

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Ayushi Ayushi 7 years ago

Smallest practical unit of energy is joule and largest practical unit of energy is kilowatt-hour.

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What is geostationary satellite ?

Posted by Mayank Tiwari 7 years ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 7 years ago

Geo means earth and stationary means at rest. This means something which is stationary.
Satellites orbiting around the Earth in equatorial plane with time period equal to 24 hours.
Appear to be stationary with respect to earth. They also rotate around earth with time period of 24 hours.
These satellites can receive telecommunication signals and broadcast them back to a wide area on earth.
Example: INSAT group of satellites.

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A satellite in force free space sweeps stationery interplanetary dust at the rate dm/dt=av. Calculate acceleration of satellite.

Posted by Rameshwar Singh 7 years ago

CBSE > Class 11 > Physics

0 answers

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As it is known that action and reaction are equal and opposite then why dont they cancel each other

Posted by Navjot Singh 7 years ago

CBSE > Class 11 > Physics

2 answers

Simran Sian 7 years ago

Because they act on different objects

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Chesta Pawan Manchanda 7 years ago

I think because they attract each other and there is a force of attraction between them

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Find the expression for velocity of particle in simple harmonic motion

Posted by Subham Rajput 7 years ago

CBSE > Class 11 > Physics

0 answers

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A sphere of mass 50 kg and diameter 2m rolling without slipping with a velocity of 5 M per second calculate its Total energy

Posted by Rajveer Singh Charan 7 years ago

CBSE > Class 11 > Physics

2 answers

Harsh Mishra 7 years ago

Hope, you Guys could understand.☹??

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Harsh Mishra 7 years ago

Mass of sphere =m, radius =r Moment of Inertia =2/5Mr^2 Total energy =Kr+Kt K(total)=(half (0.7into I into square of omega) + (half into m into square of v) . =1/2 into 2/5 m into square of r into (v^2/r^2) + 1/2 mv^2 . (since,v=r ✖ omega) K(total)= 1/2 ✖ (7/5)mv^2 . K(total) =(1/2)*(7/5)*m*v^2 . =(0.7)*m*v^2 . =0.7*50*5^2 . =875 Joules ⬅ Ans.

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Define and derive the term 'Radius of gyration'.

Posted by Suman Kumar 7 years ago

CBSE > Class 11 > Physics

2 answers

Lily ☺ 7 years ago

The moment of inertia of the body is I=m1k1^2+m2k2^2+m3k3^2.... Of m1 =m2 =m3 ...mn I=k^2(nm)k^2 I=mk^2 Radius of gyration ,k=√(I/m)

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Lily ☺ 7 years ago

The radius of an imaginary circle where all the particles of a body are assumed to be distributed on a circumference is called radius of gyration.

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Derive the expression for terminal speed of spherical body of density p (rho) inside a viscous medium of density sigma

Posted by Ashish Meena 7 years ago

CBSE > Class 11 > Physics

0 answers

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defference between gravitation potential and gravitational potential energy

Posted by Kunal Chauhan 7 years ago

CBSE > Class 11 > Physics

2 answers

Ritu Thapliyal 7 years ago

Gravitational potential energy is the energy associated with it due to its position in the gravitational field of the another body

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Ritu Thapliyal 7 years ago

Gravitational potential at a point in the gravitational field of a body is the amount of work done in bringing a body of unit mass from infinity to a particular point

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Cbse

Posted by Christin Mathew 7 years ago

CBSE > Class 11 > Physics

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Why a force necessary for a work to be done?

Posted by Kumar Manglam 7 years ago

CBSE > Class 11 > Physics

1 answers

Sivan Karthick 7 years ago

we knowPush or Pull is called force studied in lower classes if a work is said to be done when the Body mo Ves along with the direction of force Then Force is needed tomake the body mone

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Derive the expression for modulus of elasticity

Posted by Shubham Lodhi 7 years ago

CBSE > Class 11 > Physics

2 answers

Sivan Karthick 7 years ago

hook's lawstress is directly proportional to strain, then stress equal to EstrainThen E=stress/strain

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Prince Neeraj 7 years ago

Stress/strain

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Difference between specific heat of gas

Posted by Gautam Jain 7 years ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 6 months ago

Please ask question with complete information.

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difference bw stress and pressure??

Posted by Mohd Danish 7 years ago

CBSE > Class 11 > Physics

1 answers

Amayra Singh 7 years ago

1. pressure represent intensity of external forces acting at a point. but stress represent intensity of internal resisting forces develop at a point. 2. pressure is always acts normal to the surface. but stress may also act either normal or parallel to the surface. 3. magnitude of pressure at a point in all direction remain same. but magnitude of stress at a point in all the direction are unequal. 4. pressure can be measure by using measuring device.like pressure gauge. but stress can't be measure directly by using any device.

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Hello friends i have a doubt from physics part two book page no. 279 example 11.2 Tell any coreect formula for this question

Posted by Prakhar Srivastava 7 years ago

CBSE > Class 11 > Physics

0 answers

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What is the difference between gravity and gravatation

Posted by Brajesh Kumar 7 years ago

CBSE > Class 11 > Physics

1 answers

Ayushi Ayushi 7 years ago

Gravitation is the attractive force existing between any two objects that have mass. The force of gravitation pulls objects together. Gravity is the gravitational force that occurs between the earth and other bodies. Gravity is the force acting to pull objects toward the earth.

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What is different between thermal capacity and water equivalent? Explain me.

Posted by Ayushi Ayushi 7 years ago

CBSE > Class 11 > Physics