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

While pulling, by weight we can pull, =netforce=weight-fsinTheta(vertically along x-axis). While pushing, by weight and also force is also applied on that to make it push, =net force=weight+Fsintheta

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Vasudha Vasudha 3 years ago

When the lawn roller is pulled, the normal component decreases that means the cosine component of force decreases. ... This will increase the frictional force. Therefore we can say that it is easier to pull the lawn roller than to push it because the normal component of force decreases when the lawn roller is pulled.

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How is a target fixed for shooting or firing from a gun from inside the moving plane

Posted by Mr. X 3 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Ankit Kumar Sain 3 years ago

Given, u=0m/s, Vertical componenet of initial velocity s=4.9cm=0.049m g=9.8m/s 2 d=25m Applying 2nd equation of motion in vertical direction s=ut+ 2 1 gt 2 s=0×+ 2 1 gt 2 s= 2 1 gt 2 t= g 2s = 9.8 2×0.049 t=0.1sec Velocity, v= t d v= 0.1 25 =250m/s

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Motion in plane line

Posted by Atul Singh 3 years, 1 month ago

CBSE > Class 11 > Physics

2 answers

Vasudha Vasudha 3 years ago

Motion in a plane is called a motion in two dimensions. Its examples are projectile motion, circular motion. For the analysis of such motion, our reference is an origin and two co-ordinate axes viz: X and Y-axis and scalar and vector physical quantities

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Mansi Joshi 3 years, 1 month ago

Motion in a plane line

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What is a blackhole ?

Posted by Sudhanshu Shekhar 3 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Priya Tomar 3 years, 1 month ago

A black hole is an area of such immense gravity that nothing—not even light—can escape from it.

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A marble moving with some velocity collides perfectly elastically head-on with another marble at rest having mass 1.5 times the mass of the colliding marble. The percentage of kinetic energy by the colliding marble after the collision is

Posted by Bhoomika Sharan 3 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Manish Rajput 3 years ago

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ANSWER

Is S. L Arora is perfect for preparation

Posted by Mohit Sharma 3 years, 1 month ago

CBSE > Class 11 > Physics

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ANSWER

A body is moving with uniform acceleration it's velociy (a) will be increasing (b)will be decreasing (c) will be uniform (d) will increase first and decrease afterwards

Posted by Anshika Patel 3 years, 1 month ago

CBSE > Class 11 > Physics

4 answers

Mansi Joshi 3 years, 1 month ago

velocity changes at uniform rate If the velocity of an object changes at a uniform rate, then the acceleration that causes the change in velocity is called uniform acceleration or constant acceleration. For example, the force of gravity imparts an acceleration uniformly which is called acceleration due to gravity. Hence,option B is correct.

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Divya. Kumari 3 years, 1 month ago

It will be increased

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Ansh Dwivedi 3 years, 1 month ago

Yess

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Anjan Karthi 3 years, 1 month ago

(a) will be increasing

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ANSWER

NCERT class 11 physics practical

Posted by Vivek Kumar Gupta 3 years, 1 month ago

CBSE > Class 11 > Physics

0 answers

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I want best notes of physics for NEET Can u all suggest me the best website or utube channel

Posted by Mannu Dahiya 3 years, 1 month ago

CBSE > Class 11 > Physics

0 answers

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The frequency of f of a stretched string depends upon the tension F length l of the string and the mass per unit t length mew of string. Derive the formula for frequency.

Posted by Debasmita Dash 3 years, 1 month ago

CBSE > Class 11 > Physics

0 answers

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A boy completes a semicircle of radius 7m in 5 second. The distance travelled by the boy is? Give full explanation.

Posted by Harleen Kaur 3 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Mannu Dahiya 3 years, 1 month ago

2πr/2 (for circumference of semicircle) = 22/7*7=22

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How can we study physics subject??

Posted by Cilestina Lepcha 3 years, 1 month ago

CBSE > Class 11 > Physics

3 answers

Heena Kangtani 3 years, 1 month ago

Clear your concept Solve ncert question and some extra question which is available on this app Practice every day And do revision compulsory

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Mannu Dahiya 3 years, 1 month ago

Through notes

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Vikas Singh 3 years, 1 month ago

By reading the book

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ANSWER

How to do Differentiation

Posted by Diksha Devi 3 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Rihan Khan 3 years, 1 month ago

Learn topic table

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What are neuton law of motoin

Posted by Harshit Kashyap 3 years, 1 month ago

CBSE > Class 11 > Physics

2 answers

Sia ? 3 years, 1 month ago

The first states that a body continues in a state of rest or uniform motion in a straight line unless it is acted on by an external force.

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Ashok Kumar 3 years, 1 month ago

First law= if any object in motion wants to be in motion, if any object in rest wants to be in rest unless, until external force applied on it. It is also called inertial law of motion... Second law= the rate of change of momentum is directly proportional to the applied external force... According to this law force is defines as product of mass and acceleration.. Third law= every action their is equal and opposite reaction , it is also called as action reaction pair...

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Two forces equal in magnitude act on a particle. When square of their resultant is equal to three time their product find angle between them?

Posted by Falak Chauhan 3 years, 1 month ago

CBSE > Class 11 > Physics

2 answers

Anjan Karthi 3 years, 1 month ago

Hope it helps. ?

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Anjan Karthi 3 years, 1 month ago

If the forces are F1 = F2, then R^2 = 3 F1F2 = 3 F1^2. Therefore, F1^2 + F2^2 + 2F1F2cos θ = 3F1^2. Or, 2F1^2 + 2F1^2 cos θ = 3F1^2. 2F1^2 (1 + cos θ) = 3F1^2. cos θ = 3/2 -1 = 1/2. Therefore, angle = cos^-1 (1/2) = 60//

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A bus is moving with a speed of 10m/s on a straight road. A scooterist wishes to overtake the bus in 100s. If bus is at dist. of 1km from scooterist., with what speed should the scooterist chase bus?

Posted by Falak Chauhan 3 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Akshat Mishra 3 years, 1 month ago

20m/s

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For motion in 3 dimensions we need Options :- No frame of reference is required a single point will do. No frame of reference is required ; a set of 3 points will do. frame of reference consisting of a clock and a Cartesian coordinate system having three mutually perpendicular axes, labeled X-, Y-, and Z- axes frame of reference consisting of a clock and a Cartesian coordinate system having two mutually perpendicular axes, labeled X-, and Y- axes

Posted by Pradyuman Kaushik 3 years, 1 month ago

CBSE > Class 11 > Physics

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The resultant of two forces is 20N.When on of the force is 10√3 N and angle between two forces is 30° , then what is value of second force

Posted by Falak Chauhan 3 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Sirjan Kaur 3 years, 1 month ago

Solution to this problem ?? A+B= R So, B= R-A Now B^2 = R^2 + A^2 - 2RA cos30° B^2 = (20)^2 + (10√3)^2 - 2(20×10√3) × √3/2 So B^2 = 400+ 300 - 600 B^2= 700-600 B^2 = 100 Hence , B = 10 N

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What Is The Difference Between Precision And Accuracy (I Dont Want NCERT Exact Same Answer)

Posted by Harry Richard 3 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Sia ? 3 years, 1 month ago

Precision means the closeness of various measurements for the same quantity. Accuracy is the agreement of a particular value to the true value of the result.

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A blog slides down on an inclined plane of inclination 30° with an acceleration a=g/4. Find the coefficient of kinetic friction.

Posted by Ayushi Tiwari 3 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Sia ? 3 years, 1 month ago

Given :Inclination angle=θ=30 degreesa=g/4 m/s²Coefficient of Kinetic friction .

Total net force= mg/4=mgsinθ-μmgcosθ

where μ is coefficient of kinetic friction.

mg/4=mg[sinθ-μcosθ]

[sinθ-μcosθ] =1/4

Substituting the inclination angle, we get

sin30- μcos30=1/4
1/2-μ√3/2=1/4
1/2-1/4=μ√3/2
2-1/4=μ√3/2
1/4=μ√3/2

μ=1/√3/2

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A fluid move along a surface at a height 0.75m with a speed of 3.0m/s.If the shearing stress is 3N/m^2. find the cofficient of viscosity?

Posted by Anurag Singh 3 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Anurag Singh 2 months, 3 weeks ago

solution

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What is the difference between mass and weight ?

Posted by Hottam Kumawat 3 years, 1 month ago

CBSE > Class 11 > Physics

5 answers

Ashok Kumar 3 years, 1 month ago

1. Mass= Actual amount of matter present on the substance or matter is called mass. Where as weight is kind of force which possess in downward direction through the earth... 2. Mass is fixed at every place of the universe but weight can change place to place because acceleration due to gravity is change. 3. SI unit of mass is kg. & SI unit of weight is N(newton).

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Roushan Kumar 3 years, 1 month ago

No you are totally wrong Arpit Kumar ,...mass doesn't measure how much force it will take to change the way .but actul fact is that mass is the measure of inertia

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Roushan Kumar 3 years, 1 month ago

Mass ka mtlb Ki the mass of all atoms contained by a substance ...mass is not a force but weight is a force which acts in downward direction..mass can never be zero Because the mass of atoms can't be in negative, Mass is always fixed because the mass of an atom can't be changed because the proton and neutron can't be ejected from the nucleus, But weight varies from place to place . Mass is a scalar questions and weight is a vector because it a force .and force follow vector law of edition so it's a vector Quantity And about unit then mass is kg and weight is Newton

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A K 3 years, 1 month ago

1. Mass has only magnitude but weight has both magnitude and direction. 2. Mass is scaler but weight is vector. 3. Si unit of mass is kg, but si unit of weight is newton. 3 marks to aram se aa jayenge??

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Arpit Kumar 3 years, 1 month ago

Mass is a measure of how much force it will take to change that path. Weight, on the other hand, is a measure of the amount of downwards force that gravity exerts on an object.

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During the motion of a lift, apparent weight of a body becomes twice its actual weight, when (a) lift is moving down with acceleration g (b) lift is moving up with acc. g (c) lift is moving down with uniform speed (d) lift is moving up with uniform velocity

Posted by Efat Naaz 3 years, 1 month ago

CBSE > Class 11 > Physics