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If a running boy jumps on a rotating table,which of the following is conserved? (a) linear momentum (b) K.E (c) angular momentum (d) none of these

Posted by Sony Chauhan 4 years, 9 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

A body cannot roll without slipping on a (a) rough horizontal surface (b) smooth horizontal surface (c) rough inclined surface (d) smooth inclined surface

Posted by Sony Chauhan 4 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Moments of inertia does not depend upon (a) distribution of mass (b) axis of rotation (c) point of application of force (d) none of these

Posted by Sony Chauhan 4 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Angular momentum of a system of particles change,when (a) force acts on a body (b) torque acts on a body (c) direction of velocity change (d) none of these

Posted by Sony Chauhan 4 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

During inelastic collision b/w two bodies, which of the following quantities always remain conserved (a) total kinetic energy (b) total mechanical energy (c) total linear momentum (d) speed of each body

Posted by Sony Chauhan 4 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Rgb Hfs 4 years, 10 months ago

Total linear momentum

ANSWER

When the kinetic energy of a body is increased to three times, then the momentum increase (a) 6 times (b) 1.732 times (c) √2 times (d) 2 times

Posted by Sony Chauhan 4 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Which of the following forces are non - conservative? (a) fractional (b) spring (c) elastic (d) all of these

Posted by Sony Chauhan 4 years, 10 months ago

CBSE > Class 11 > Physics

3 answers

Nav Dahyia 4 years, 9 months ago

Frictional

Harjeet Singh 4 years, 10 months ago

Fractional

Himani Rajput 4 years, 10 months ago

Frictional

ANSWER

a boy pushes a box 2.0m along the floor by means of a force of10N directed upward at an angle of 60°to the horizontal.the work done by the boy is (a) 6J (b) 8J (c) 10J (d) 12J

Posted by Sony Chauhan 4 years, 10 months ago

CBSE > Class 11 > Physics

2 answers

Prachi Agarwal 4 years, 9 months ago

W= F*S cos theta = 10*2*cos 60° =10*2*1/2 =10J { Ans}

Prachi Agarwal 4 years, 9 months ago

C : 10 J

ANSWER

Two bodies A and B having masses in the ratio of 3:1 possess the same kinetic energy. The ratio of linear momentum of B to A is (a) 1:3 (b) 3:1 (c) 1:√3 (d) √3:1

Posted by Sony Chauhan 4 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Centripetal force (a) can change speed of the body (b) is always perpendicular to direction of motion (c) is constant for uniform circular motion (d) all of these

Posted by Sony Chauhan 4 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

A body is thrown with a velocity of 9.8ms-1 making an angel of 30°with the horizontal.It will hit the ground after a time (a) 3.0s (b) 2.0s (c) 1.55 (d) 1s

Posted by Sony Chauhan 4 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

The bomb is released from a horizontal flying aeroplane. The trajectory of bomb is (a) parabola (b) a straight line (c) a circle (d) a hyperbola

Posted by Sony Chauhan 4 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

A ball is thrown up with velocity 19.6m/s. The maximum height attained by the ball is (a) 29.2m (b) 9.8m (c) 19.6m (d) 15.8m

Posted by Sony Chauhan 4 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

The displacement of a body is zero. The distance covered is (a)is zero (b) not zero (c) may or may not be zero (d) depends on the acceleration.

Posted by Sony Chauhan 4 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Bhupesh Yadav 4 years, 9 months ago

may or may not be zero

ANSWER

What is light year?

Posted by Sony Chauhan 4 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Bhushan Lal Sahu 4 years, 10 months ago

Light year is the distance traveled by light in One year.

ANSWER

The number of significant figures in 0.06900 is ?

Posted by Sony Chauhan 4 years, 10 months ago

CBSE > Class 11 > Physics

2 answers

Bhupesh Yadav 4 years, 9 months ago

4 significant figures

Nishant Raj 4 years, 10 months ago

4 significant figures (considering 2 zero significant.)

ANSWER

Error in the measurement of radius of a sphere is 1%,then error in the measurement of volume is? (a)1% (b)5% (c)3% (d)8%

Posted by Sony Chauhan 4 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is moi

Posted by Ansh Agrawal 4 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 8 months ago

Rotational inertia, or the moment-of-inertia (MOI) is a measure of how difficult it is to change the rotational velocity of an object which is rotating about a pivot point. The larger the moment-of-inertia, the more difficult it is to change the rotational speed of the object.

ANSWER

Prove that the gravitational force is a conservative force ?

Posted by Abheer Rajput 4 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

when does class 11 exam will be conducted

Posted by Brajbhushan Aditya 4 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Uttkarsh Joshi 4 years, 10 months ago

I think 2 march

ANSWER

What is the apperant weight felt by a person in an elevator when it is accelerating 1.upwards by a 2.downwards by a

Posted by Yamini Singh 4 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Monu Kumar 4 years, 10 months ago

Ans is 3

ANSWER

Define projectile motion and define expression for time of flight , horizontal range and max height

Posted by Janvi Gupta 4 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Abheer Rajput 4 years, 10 months ago

Projectile motion = A motion experienced by an object or particle that is projected near earth surface and moves along a curved path under the action of gravity.

ANSWER

Dimensional analysis applications

Posted by Ramya Kumar 4 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Can we design an aeroplane which is very light but sufficiently strong ?

Posted by Jaspreet Kaur 4 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Jansi Sabharwal 4 years, 10 months ago

Yes we can With aluminium as aluminium is light in weight and it is a strong metal.

ANSWER

A person of mass 60kg lift a stone of 20kg to a height of 30meter. Calculate work done by person.

Posted by Deeksha Deora 4 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Tanisha Verma 4 years, 10 months ago

M=60+20=80Kg H=30m g=10 W=m×g × h =80×10×30 =24000J

ANSWER

When a particle moving forward to the constant speed in the download with speed of 20m/sec then find the displacement and distance covered by the particle in t/5second

Posted by Rahul Kumawat I 4 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is coefficient of liner expansion

Posted by Himanshu Swami 4 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Raunak Chauhan 4 years, 10 months ago

C of linear expansion is defined as the expansion take place in a 1meter rod at 1℃

ANSWER

Derivation of average kinetic energy per molecule of the gas

Posted by Himani Rajput 4 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

brief discuss about any 3 international competition of althetes

Posted by Kirandeep Sandhu 4 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Which question bank is correct cbse imp. Question or cbse text

Posted by Praveen Kumar 4 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

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