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

No products in the cart.

Ask questions which are clear, concise and easy to understand.

Ask Question

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 4 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

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 4 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Sirjan Kaur 4 years, 2 months 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

ANSWER

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

Posted by Harry Richard 4 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 2 months 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.

ANSWER

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 4 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 2 months 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

ANSWER

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 4 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Anurag Singh 1 year, 3 months ago

solution

ANSWER

What is the difference between mass and weight ?

Posted by Hottam Kumawat 4 years, 2 months ago

CBSE > Class 11 > Physics

5 answers

Ashok Kumar 4 years, 2 months 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).

Roushan Kumar 4 years, 2 months 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

Roushan Kumar 4 years, 2 months 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

A K 4 years, 2 months 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??

Arpit Kumar 4 years, 2 months 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.

ANSWER

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 4 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Sia ? 4 years, 2 months ago

Lift is moving up with acceleration = g

Anjan Karthi 4 years, 2 months ago

(b) lift moves up with acc g.

ANSWER

Express Young’s Modulus of steel in dyne/cm3 Given, Young’s Modulus of steel is 19 x 1010 N/m2.

Posted by Kundan Kumar 4 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Sia ? 4 years, 2 months ago

When expressed in CGS units of it will be equal to

Young's modulus of steel is Expres it . Here dyne is the CGS unit of force. Thus,

Harshit Masiwal 4 years, 2 months ago

MLT

ANSWER

Relative valocity

Posted by Ankit Jat 4 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Harshit Masiwal 4 years, 2 months ago

The velocity that is relative

ANSWER

The word physics come from??

Posted by Vivek Saxena 4 years, 2 months ago

CBSE > Class 11 > Physics

5 answers

Ashok Kumar 4 years, 2 months ago

The word "physics" comes from greek word " fusis" means nature.. Physics is the study of nature and its law..

Harshit Masiwal 4 years, 2 months ago

Greek

Roushan Kumar 4 years, 2 months ago

The word physics comes from.a Greek word physis which means nature

Xt Phinex 4 years, 2 months ago

The word "physics" comes from Ancient Greek

A.K. Administrative 4 years, 2 months ago

Not knowned

ANSWER

A car starts from rest,moves with an acceleration a and then retards at a constant rate b for sometime to come to rest.If the total time is t, the maximum velocity of the car is given by??

Posted by Srishtika Murugan 4 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Sanampreet Singh 4 years, 2 months ago

Fg

ANSWER

If A vector =4i^+ 4j^-4k^ Bvector =3i^+j^+4k^, then angle between a vector and b vector is.

Posted by Udaxi Ratnakar 4 years, 2 months ago

CBSE > Class 11 > Physics

3 answers

Udaxi Ratnakar 4 years, 2 months ago

Thnq

Ankit Jat 4 years, 2 months ago

0

Saksham Agrawal 4 years, 2 months ago

A+B = 7i+5j+0k |A|=4root3 |B|= root26 |R| =|A+B| = root74 Now, use the formula for resultant |R|= root(|A|² +|B|² + 2|A||B|cosø) ,where ø is angle btw A and B By putting values you will get ans??

ANSWER

Radius of gyration?

Posted by Mahak Madan 4 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Ashok Kumar 4 years, 2 months ago

Radius of gyration is a type of distance, Its SI unit is metre(m), its dimension is [L].

ANSWER

Assertion: Displacement of a body is vector sum of the area under velocity-time graph. Reason: Displacement is a vector quantity.

Posted by Pratyaksh Varshney 4 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Ashok Kumar 4 years, 2 months ago

Both are true, "b" is the correct explanation of "a"..

ANSWER

What is work energy theorm

Posted by Anshu Yadav 4 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Anjan Karthi 4 years, 2 months ago

The work done by an external unbalanced force on a given body is equivalent to the change in kinetic energy which has occured in the object. This is known as WORK ENERGY THEOREM. ie, W = FScosθ = K2 - K1.

ANSWER

What are the scientific methods

Posted by Deepak R 4 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Kinatic energy of rolling body

Posted by Kowshik Pl 4 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Show that the motion of a simple pendulum is simple harmonic and hence derive an equation for its time period what is second pendulum

Posted by Nandhu Reddy 4 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Derive trajectory equation?

Posted by Akshat Mishra 4 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Anjan Karthi 4 years, 2 months ago

H (ψ) = Ε (ψ). Where H is Hamiltonian operator and (ψ) is wave function. )

ANSWER

Chapter 4

Posted by Tanu Jangid 4 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Ankit ............ 4 years, 2 months ago

See on this app

ANSWER

What is electronagativity

Posted by Satish Jaisawal 4 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Ankit ............ 4 years, 2 months ago

Symbolised by X tendency of an atom of given element to attract shared electron when forming chemical bond.

Ankit ............ 4 years, 2 months ago

Symbolised by X

ANSWER

the initial velocity of a bike is 60 km h.the brakes were applied so as to produce uniform acceleration in opposite directions -3ms-².Calculate the time taken to become at rest in ms-²

Posted by Ruatkima B.Lalruatkima 4 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Anjan Karthi 4 years, 2 months ago

u = 60 km/h × 5/18 = 16.6 m/s.. v = 0 m/s. a = -3 m/s^2. t = ? Therefore, t = v-u/a = -16.6/-3 = 5.5 s//

ANSWER

The displacement in metres of a body varies with time t in second as y = t2 – t – 2. The displacement is zero for a positive of t equal to

Posted by Rajkumari Ragini 4 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Baibhav Sanket Padhy 4 years, 2 months ago

2

ANSWER

Is this app has ncert examplar too

Posted by Sunita Singh 4 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Ankit ............ 4 years, 2 months ago

Yes

Aashay Tembhurne 4 years, 2 months ago

Yes

ANSWER

using Calculus establish the reaction v2-u2-2as

Posted by Saud Shaikh 4 years, 2 months ago

CBSE > Class 11 > Physics

3 answers

Shivani Kumari 4 years, 2 months ago

THIRD LAW OF MOTION EXPLANATION BY CALCULUS METHOD a = dv/dt × ds/ ds a = ds/ dt × dv/ds a = v × dv/ds v dv = a ds ✓ v dv = a ✓ ds [V2/2]2 = a[ s ] V2/2- u2/2 = a ( s-0 ) V2-u2/2 = as {v2- U2 = 2as} proved

Shrey Patel 4 years, 2 months ago

Kapada

Shrey Patel 4 years, 2 months ago

E shark hairs tari ota di pa au oya ap park layoffs ooze oasis

ANSWER

Why pulling a roller is injerous then pushing?

Posted by Prajwal Kumar 4 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

The length and the radius of a cylinder measured with the slide calipers are found to be 4.54cm and 1.75cm respectively .calculate the volume of the cylinder

Posted by Jatin Gujjar 4 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Anjan Karthi 4 years, 2 months ago

V = π r^2 l = 3.14 × 1.75 × 1.75 × 4.54 = 43.657775 cm^3. //

ANSWER

Conservation ofo

Posted by Nived Narayan 4 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Write the dimensional formula for. Work, velocity, kinetic energy, pressure, acceleration.

Posted by Arati Sunel 4 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Anjan Karthi 4 years, 3 months ago

Work = [M L^2 T^-2]. Velocity = [LT^-1]. Kinetic energy = [ML^2T^-2]. Pressure = [ML^-1T^-2]. Acceleration = [LT^-2].

ANSWER

What is centripetal acceleration? Why is it produced in the curve linear motion?

Posted by Shivani Kumari 4 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Page 23 of 557

myCBSEguide App

myCBSEguide

Trusted by 1 Crore+ Students

Test Generator

Test Generator

Create papers online. It's FREE.

CUET Mock Tests

CUET Mock Tests

75,000+ questions to practice only on myCBSEguide app

Google Play

Download myCBSEguide App