Centre Of Gravity
If a body is supported on a point such that total gravitational torque about this point is zero, then this point is called centre of gravity of the body.
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CUET UG Entrance Exam 2023-24 Physics Chapter-Wise Short Notes, Questions-Answer, Practice Sets With Solution The Common University Entrance Test (CUET-UG): National Testing Agency (NTA) has been entrusted with the responsibility of conducting the entrance tests for all the Central Universities (CUs) for the academic session 2023-2024. CUET will provide a single window opportunity to students
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Principle of Moment
When an object is in rotational equilibrium, then algebraic sum of all torques acting on it zero. Clock-wise torques are taken negative and Anti clock-wise torques are taken positive. We consider a rod of negligible mass is provided at some point like a see-saw or a lever. Pivot of lever is called fulcrum. NCERT Class
Couple
A pair of equal and opposite forces with parallel lines of action are known as a couple. A couple produces rotation without translation. Let a couple with forces -F and F acting at A and B points with position vector r₁ and r₂ with respect to some origin O. NCERT Class 11 Physics Book PDF
Equilibrium of a Rigid Body
A Rigid body is said to be in equilibrium, if both of its linear momentum and angular momentum are not changing with time. Thus, equilibrium body does not posses linear acceleration or angular acceleration. This means, (I) The total force, i.e the vector sum of all forces acting on the rigid body is zero. That
Conservation Of Angular Momentum
As we know That means L = Constant with time. Hence, without any external torque, Angular momentum of a system of particles remains constant. That is known as the conservation of angular momentum. NCERT Class 11 Physics Book PDF Free Download Also Read SL Arora Class 11 Physics Book PDF Free Download All In One
Torque and Angular Momentum For A System Of Particles
For a system of particles or a rigid body with n-particles, the total angular momentum of the system is the vector sum of the angular momenta of the individual particles. Thus, the time rate of the total angular momentum of a system of particles about a point is equal to the sum of the external
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