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What is hooks law

Posted by Sanju Didel 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Rahul Poddar 8 years, 2 months ago

According to hooks law stress is directly proportional to strain stress=E strain

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What is relation between G and G

Posted by Aayushi Pal 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Rahul Poddar 8 years, 2 months ago

G=gr^2/m or g=Gm/r^2

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Why newton second law of motion is real law of motion

Posted by Nitish Prasad 8 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Akhil Bohra 8 years, 2 months ago

Newton's second law is the real law of motion in the sense that the firest and third law of motion can be derived from the 2nd law of motion. This means that if no force is applied on the body, its acceleration will be zero

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Akhil Bohra 8 years, 2 months ago

Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

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A particle of mass m moving with velocity u makes an elastic 1d collision with a stationary particle of mass m .they are in contact for brief time t their force of interaction increase from zero to f linearly in time t/2 and decrease linearly to zero in further time t/2 .the magnitude of f is

Posted by Himanshu Gupta 8 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

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Bernoulli's theorem

Posted by Sahil Deswal 8 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

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Define mass

Posted by Sadaf Shaikh 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Abhi Dhamnikar 8 years, 2 months ago

Mass is defined as the force that is applied the gravity on object

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A uniform chain of length 2m is kept on a table shch that a length 60cm hangs freely from the edge of the table . The total mass of the chain is 4 kg . What us work done in pulling the entire chain on the table.

Posted by Taniya Kajal 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Ankit Kumar 8 years, 2 months ago

chain mass intensity per unit length = 4kg/2m

ie.,I= 2kg/m

mass of chain of length hanged from table ie., 60cm = 0.6*2=1.2kg

now weight of 60 cm chain hanged from table = 9.8 * 1.2=11.76 N

now since gravitational force in both sections i.e, 140cm(on table) and 60cm(hanged from table) will be vertical in direction but we will exert force horizontally.

so we will consider only the work done to slide the table edged point of chain( the point on chain positioned at the edge from which the chain is hanged) to side it 60 cm horizontally over table so that the last end of chain also comes on the table

so we will require the force acting horizontall valued equal to the gravitational force to slide it 60cm horizontally.

so work required =11.76*0.6=7.056 Joule

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Difference between static friction kinetic friction and limiting friction

Posted by Abhishek Kumar 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Ankit Kumar 8 years, 2 months ago

static friction :- if a body is at rest and we apply the insufficient force to slide it so that the body keeps in rest without tending to any disturbance in its position due to a opposite force acting on it between the two contact surfaces. that opposite force is known as static friction

limiting friction:- it can be defined as the friction offered by contact surface about which body tends to move due to external increasing force. ie., it is the maximum value of static friction.

kinetic friction:; the friction exerted during the motion of the body.

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What is the dimensional formula of force

Posted by Sandeep Thakur 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Ankit Kumar 8 years, 2 months ago

FORCE = MASS * ACCELERATION

[FORCE] = [MASS] *[ACCELERATION]

[F]= [M] * [LT^-2]

[F]= [MLT^-2]

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Is it possible to take 1 year gap after passing class 11th * I want a gap for IIT class 11th preperation

Posted by Aditya Yadav 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Srishti Rachna 8 years, 2 months ago

you can take a year gap after 12 for your iit preperations

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Time period T depends upon the radius 'r' density d and surface tension S obtain the expression for time period by using method of dimension

Posted by Syed Saif 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Taniya Kajal 8 years, 2 months ago

T=kr^a d^b S^c Dimension of T =T Dimensionof r=L Dimension of S =MT^-2 Now you can solve it easily.

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Second law of motion derives 3rd law

Posted by Tamanna Mehra 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Taniya Kajal 8 years, 2 months ago

Acc. to 3rd law Fab=―Fba Acc to 2nd law Fab=dpA/dt....1 Similarly Fab=dpB/dt...2 Adding 1 and 2 Fab+Fba=(dpA/dt+dpB/dt) =d(pa+pb)/dt Acc to conservation od momentum pA +pB=constant So Fab=―Fba Hence proved

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Si unit of velocity

Posted by Sumit Kumar 8 years, 3 months ago

CBSE > Class 11 > Physics