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"The centre of mass is a position defined relative to an object or system of objects. It is the average position of all the parts of the system, weighted according to their masses. For simple rigid objects with uniform density, the centre of mass is located at the centroid

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Unit of Force

Posted by Aman Kumar 7 years, 4 months ago

CBSE > Class 11 > Physics

3 answers

Mr. Thakur☆☆ 7 years, 4 months ago

A newton (N) is the international unit of measure for force. ☺☺ 1 NEWTON of force is the force required to accelerate an object with a mass of 1 kilogram 1 metre per second. ☺☺☺☺

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Nancy Rajput 7 years, 4 months ago

newton

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Mr. Thakur☆☆ 5 years, 8 months ago

It is very hard question.???

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A man of mass 70 kg stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 10 m s−2 what would be the reading on the scale?

Posted by Nancy Rajput 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Nancy Rajput 7 years, 4 months ago

pls answer this its urgent

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If work done is a scalar quantity then why do we have positive and negative form of work?

Posted by Nancy Rajput 7 years, 4 months ago

CBSE > Class 11 > Physics

6 answers

Devashri Kulkarni 7 years, 4 months ago

Work done is a scalar quantity as it is a dot product of two vector quantities (W=F.S) , and dot product of any two quantities is a scalar quantity. Infact dot product is also known as scalar product. But since force and displacement are vector quantities they can be negative in value and hence work done can also turn out to be negative.

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Subam Sihag 7 years, 4 months ago

Work done is scaler quantity bcz dot product of two vector quantity is always scaler (W=F.D)

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Aman Kumar 7 years, 4 months ago

That what I m saying. It is vector quantity

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Isha Bhardwaj 7 years, 4 months ago

I think work done is not a scalar quantity bcoz , It is product of force and displacement and these both are vector quantities....

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Nancy Rajput 7 years, 4 months ago

you explain me in detail

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Aman Kumar 7 years, 4 months ago

R u sure work done is scaler quantity... Because W.D= force ×displacement... And displacement has direction and direction can be positive or negative... If u r confused than sry.. I can't able to give this answer.

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r = 2 g/cm3 convert it into MKS system -

Posted by Nancy Rajput 7 years, 4 months ago

CBSE > Class 11 > Physics

4 answers

Nancy Rajput 7 years, 4 months ago

thanks sis

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∂Αяѕнαиαα ყα∂Αѵ ??? 7 years, 4 months ago

r=2g/cm³,,, ,,,, =(2)× 10^-3kg/(10^2m)^-3,,, ,,,,, =2×10^3 kg/m³

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Nancy Rajput 7 years, 4 months ago

its metre , kilogram and second

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Aman Kumar 7 years, 4 months ago

What is this MKS

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Distinguish between differentiation and integration.

Posted by Mr. Thakur☆☆ 7 years, 4 months ago

CBSE > Class 11 > Physics

4 answers

Mohit Kumar Singh 7 years, 4 months ago

Calculas has two parts one differention means dividing in very small parts and integration means adding all that small parts

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Mr. Thakur☆☆ 7 years, 4 months ago

Kya aaap example k sath explain kar sakte ho.

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Isha Bhardwaj 7 years, 4 months ago

Yaaa...they are just opposite...

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Aman Kumar 7 years, 4 months ago

In simple word, in differentiation we use to separate but in case of integration we use to combine or taking together....

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From square sheet of uniform density a portion is removed find centre of mass of remaining portion if side of square is a

Posted by Sanjay Joshi 7 years, 4 months ago

CBSE > Class 11 > Physics

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Add a velocity of 30m/s eastwards to a velocity of 40m/s northwards. calculate the magnitude and direction of the resultant with the east.

Posted by Vishal Singh 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Mohit Kumar Singh 7 years, 4 months ago

It simply deals with simple vectors calculations I don't have much time tu solve for u first imagine that the two velocity are two vectors and u have to find the resultant vector of the two and find the angle ftom the east one vector to the resultant vector

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Circular motion of a car on a level road

Posted by Sudharshan Durairaj 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

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two railway tracks are parallel to west-east direction .along one track train A moves with a speed of 30ms^-1 from west to east ,while along the second track train B moves with a speed of 48ms^-1 from east to west .calculate i)relative speed of B wrt A and ii)relative speed of ground wrt B

Posted by Akash Kumar 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Mohit Kumar Singh 7 years, 4 months ago

i> 18m/s velocity from East to west ii> 48 m/s

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What is the dimension of gravitional acceleration

Posted by Mohit Singh 7 years, 4 months ago

CBSE > Class 11 > Physics

7 answers

Nancy Rajput 7 years, 4 months ago

okk

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Aman Kumar 7 years, 4 months ago

Is anyone remembered me??? ?

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Aman Kumar 7 years, 4 months ago

G= force ×distance ^2/mass^2 =M^-1L^3T^-2

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Nancy Rajput 7 years, 4 months ago

gravitational constant

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Aman Kumar 7 years, 4 months ago

Just take it easy

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Nancy Rajput 7 years, 4 months ago

how you explsin this

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Xyz Abc 7 years, 4 months ago

Lt^-2

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what is the dimension of mass

Posted by Mohit Singh 7 years, 4 months ago

CBSE > Class 11 > Physics

4 answers

Mohit Kumar Singh 7 years, 4 months ago

M^1 L^0 T^0 we can consider the dimension if mass as M because all the remaining powers are 0

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Ashwini Kumar 7 years, 4 months ago

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Aman Kumar 7 years, 4 months ago

Dimension of mass = M

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Nancy Rajput 7 years, 4 months ago

in dimensions analysis of mass is M

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Syllabus of first term

Posted by Gautam Mishra 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

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Explain projectile motion is parabolic

Posted by Priyanshu Choubey 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

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Projectile motion is parabolic

Posted by Priyanshu Choubey 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Rakshit Agarwal 7 years, 4 months ago

Yes it is

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What is mass of universe

Posted by Shreyas Mulay 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Aman Kumar 7 years, 4 months ago

Mass of universe= infinity to the power imagination ?

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The greatest value of function -5sintheta+12costheta

Posted by Khushi Bhargav 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

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How can we define 1 Newton?

Posted by Roshan Hansraj Pandey 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Isha Bhardwaj 7 years, 4 months ago

1 Newton is that much force which is excert when a body of mass 1 kg produce an acceleration of 1 m/sec ^2

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What is mechanical power??????

Posted by Dinesh Raajan 7 years, 4 months ago

CBSE > Class 11 > Physics

2 answers

Xyz Abc 7 years, 4 months ago

The ability to do work due to change in mtion or configuration of the object is called mechanical energy. Ability to do work is called energy . And this work done in per unit time is called mechanical power

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Rakshit Agarwal 7 years, 4 months ago

Mechanical power can be defined as the sum of the kinetic energy and the potential energy.

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What is amagnitude of a vector

Posted by Sarthak Nahar 7 years, 4 months ago

CBSE > Class 11 > Physics