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

An object is in translational equilibrium when the sum of all the external forces acting on the object equals zero. This also means an object is in translational equilibrium when it is experiencing zero overall acceleration. Therefore, it is either not moving or moving at a constant velocity. Rotational equilibrium an object is in rotational equilibrium when the sum of all the external torques acting on it equals zero. In rotational equilibrium, an object either will not be moving or moving at a constant angular velocity. This must mean the object is experiencing zero angular acceleration.

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What is mechanical energy

Posted by Rahul Yadav 7 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Priya Dharshini ☺☺ 7 years, 2 months ago

mechanical energy is the sum of potential energy and kinetic energy. It is the energy associated with the motion and position of an object.

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Why bicycle in motion doesn't fall but bicycle fall as soon as it comes to rest?

Posted by [email protected] M 7 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Priya Dharshini ☺☺ 7 years, 2 months ago

If the bicycle is at rest, it will be acted upon by downward force ( ,where is mass and is acceleration due to gravity). If it is affected just by this force, it should have stood without falling, because there is no force which pulls it to either side to make it fall. This is the reason why it fall in rest or while slowing down. When u r riding it u exert force by paddling the cycle by ur legs . The force gets balanced hence it will not fall during riding

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Which Book's Publication is best to read for CBSE Board Exams

Posted by Aman Ullah 7 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Priya Dharshini ☺☺ 7 years, 2 months ago

Ncert is best. 90% u can score for more than that u need to use few guides or ncert exemplar questions. It is available in this app

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Aman Kumar 7 years, 2 months ago

Just go for NCERT.... best for board

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Two bodies of masses 1kg and 2kg are located at (1,2) and (-1,-2) respectively.Calculate the coordinate of the centre of mass.

Posted by Mohit Gupta 7 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Ayush Kumar Singh 7 years, 2 months ago

Coordinates for center of mass is (x cm , y cm) is ( -1/3 , -2/3 ) (cm stands for center of mass )

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What are the advantages of Dimension? Mainly five.

Posted by [email protected] M 7 years, 2 months ago

CBSE > Class 11 > Physics

3 answers

[email protected] M 7 years, 2 months ago

Thank you

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Priya Dharshini ☺☺ 7 years, 2 months ago

3.Defining dimentionless constants or units that would make the physical effect to be studied easier.For e.g. Prandtl number, Reynolds number. This is a major implication of dimentional analysis in highly dynamic systems. 4.Reducing the number of experiments to be conducted. When a dimentionless quantity is formulated, the combination of experiments required for describing in them will be less when compared to the large number of participant variables in correlation.

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Priya Dharshini ☺☺ 7 years, 2 months ago

Conversion from one units to another Preliminary test for validity of equation Correlation of various parameters in an experiment to understand the relationship between them to form an empirical relationship. (Buckingham phi theorem

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A person sitting in a carriage at rest pushes it from within. Will the carriage move?

Posted by [email protected] M 7 years, 2 months ago

CBSE > Class 11 > Physics

5 answers

[email protected] M 7 years, 2 months ago

Ha bhai dekhe your logic was great but koi nahi by the way koun sa subject hai tumhara bio,maths

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Aman Kumar 7 years, 2 months ago

And ya I had solved ur thief wala question ?

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Aman Kumar 7 years, 2 months ago

??hehe sry 4 that... Mujhe lagta Hai ki Mera logic logo ko samajh aayega ki nhi... ?☺️

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[email protected] M 7 years, 2 months ago

Aman bhai tumhara bas ek hi disadvantage hai ki tum last me jake please correct me likh dete ho....kya hai aanswer sahi hai fir bhi aisa mat kar bhai humlog ka confidence ka to dhajiya hi udd ja raha hai

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Aman Kumar 7 years, 2 months ago

I think carriage will not move.. Bcoz person will also become the part of the system..... Don't know it correctly, if wrong then correct me

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What are the important derivations in gravitation chapter in examination point of view??

Posted by Hrishikesh Majumdar 7 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Aman Kumar 7 years, 2 months ago

For example point of view,... All r important bcoz we can't say which will come..

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A thief jumps from the upper storey of our house with a load on his neck. What is the force of the load on his neck, when thief is in air?

Posted by [email protected] M 7 years, 2 months ago

CBSE > Class 11 > Physics

3 answers

Aman Kumar 7 years, 2 months ago

Wlc,, I think sayad Maine ache se explain nhi kiya,... But yaa this only the answer....

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[email protected] M 7 years, 2 months ago

But bhai the body of the thief and the load forms a system and falling with free fall i.e, g=a and during the case of free fall F=m(g-a) i.e, =m(g-g)=0"zero"........Lekin bhai tu bhi correct hai.... Thanks

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Aman Kumar 7 years, 2 months ago

Ye lo Apna answer :- when thief was in air then load on his neck will feel weight less bcoz acceleration of load is equal to 'g'....

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Impulse momentum theorem derivation

Posted by Aftab Ahamad 7 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Priya Dharshini ☺☺ 7 years, 2 months ago

The impulse-momentum theorem states that the change in momentum of an object equals the impulse applied to it. The impulse-momentum theorem is logically equivalent to Newton's second law of motion (the force law). Search in google for derivation since it cannot be typed here

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A body slides down a smooth incilined plane when released from the top,while another body falls freely from the same point .whichhh one will strike the ground earlier?

Posted by [email protected] M 7 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Difference between torque and force and all the best for u r exams

Posted by Ayush Kumar Singh 7 years, 2 months ago

CBSE > Class 11 > Physics

5 answers

Priya Dharshini ☺☺ 7 years, 2 months ago

Ur wlcm

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Ayush Kumar Singh 7 years, 2 months ago

Thanks niraj ji

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Ayush Kumar Singh 7 years, 2 months ago

Thanks priya ji

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Priya Dharshini ☺☺ 7 years, 2 months ago

When you apply force in qual and opposite on any object, it gets converted into torque.Torque is the rotating force , torque is the product of force and center to point of force distance , while force is the product of mass and acceleration. Hope u get the difference

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[email protected] M 7 years, 2 months ago

When you apply force in couple (equal and opposite)on any object, it gets converted into torque. Torque is the rotating force , torque is the product of force and center to point of force distance , while force is the product of mass and acceleration.

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Is break down of helmet is boon or ban for human safety during accidents?Why?

Posted by [email protected] M 7 years, 2 months ago

CBSE > Class 11 > Physics

7 answers

Priya Dharshini ? 7 years, 2 months ago

It is curse because if our neck is weakest point and for sure we will get hurt. Because of third law of motion

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[email protected] M 7 years, 2 months ago

Hey Priya Dharshini.. Thank you... But sorrry for this,can you you explain it in simple language..

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Priya Dharshini ☺☺ 7 years, 2 months ago

When you apply force in couple (equal and opposite)on any object, it gets converted into torque. ... Torque is the rotating force , torque is the product of force and center to point of force distance , while force is the product of mass and accelerationThat, in and of itself, will decrease the amount of force necessary to break a neck. In other words, if the body and head are not in line head is at 45 degrees to the body; force of impact is a constant; and as we all know, the neck is the weakest part of the body; the amount of applied force needed to severe the spinal column will be much less. That, my friends, is the reaction of Newton's third law of motion. For every action, there is an equal and opposite reaction. What that means is the applied force (i.e., 600, 780 or 900) will be dissipated. How force is dissipated doesn't matter, but it will be dissipated. In a bike wreck, the applied force could very well be dissipated through youThat, in and of itself, will decrease the amount of force necessary to break a neck. In other words, if the body and head are not in line head is at 45 degrees to the body; force of impact is a constant; and as we all know, the neck is the weakest part of the body; the amount of applied force needed to severe the spinal column will be much less. That, my friends, is the reaction of Newton's third law of motion. For every action, there is an equal and opposite reaction. What that means is the applied force (i.e., 600, 780 or 900) will be diss

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[email protected] M 7 years, 2 months ago

Christin Mathew,which question bhai..... Bhai Please have a look on my question also.. this one

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[email protected] M 7 years, 2 months ago

Is question belong to chapter Laws of motion

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Christin Mathew 7 years, 2 months ago

Please look at my question above

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Priya Dharshini ☺☺ 7 years, 2 months ago

Which chapter ??

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Is breaking of helmet is better than the not breaking of helmet?If yes then why,if No then why?

Posted by [email protected] M 7 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

[email protected] M 7 years, 2 months ago

Question is not fully descibed...

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Why hammers with long handels preferred

Posted by Suresh Somra 7 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

[email protected] M 7 years, 2 months ago

Ha bhai agar hammer ka handle chota hoga to we will need to provide more effective force to provide any change..

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Priya Dharshini ☺☺ 7 years, 2 months ago

Moment if force depends on two factors - magnitude of force and and perpendicular distance of the line of action of the force and axis of rotation. Hence long handels means more perpendicular distance hence more force would be exerted

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Is escape velocity and escape speed both are same??

Posted by Hrishikesh Majumdar 7 years, 2 months ago

CBSE > Class 11 > Physics

5 answers

Priya Dharshini ☺☺ 7 years, 2 months ago

The correct term is ‘escape speed’. While others argue that you must be traveling in a certain direction in order to escape the gravitational pull of the primary, they neglect to say that the term ‘escape velocity’ is almost never used along with a direction in which the object is moving. If you want to use the term ‘velocity’, then you must give a direction. If you don’t, then you are simply adding to the obfuscation that already exists between these terms. On a moon or another body with negligible atmosphere, you can move in almost any direction you like at the escape speed and still escape the body’s gravity. The only requirement on your direction is that you don’t end up hitting the body itself. It is not the velocity that is limiting you; it is the speed. These two words are so conflated in popular culture already; it’s time to de-conflate them.

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[email protected] M 7 years, 2 months ago

But Priya Dharshini, you have described Escape velocity...what about escape speed?

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Aman Kumar 7 years, 2 months ago

If I m wrong then correct me

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Aman Kumar 7 years, 2 months ago

I think they both are same....bcoz speed also depends on magnitude ....and escape velocity also says that at what magnitude we throw anything so it goes outside the earth field ...

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Priya Dharshini ☺☺ 7 years, 2 months ago

Escape velocity is the minimum vertical speed required to over come the gravitational pull of the Earth and to leave its orbit. Escape velocity for the Earth is relatively constant and is approximately 7 miles/s.

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How many joule in 1 watt hour

Posted by Himanshu Kumar 7 years, 2 months ago

CBSE > Class 11 > Physics