jee_main_2025_08_april_evening - Rotational Motion Topics

Master these core formulas and structures to solve almost any past paper question.

Sample Questions in this Chapter

QUESTION #2 Moment of Inertia
A rod of linear mass density λ and length L is bent to form a ring of radius R. Moment of inertia of ring about any of its diameter is:
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QUESTION #24 Angular Acceleration and Torque
A thin solid disk of 1~kg is rotating along its diameter axis at the speed of 1800~rpm. By applying an external torque of 25π~N· m for 40~s, the speed increases to 2100~rpm. The diameter of the disk is ________ ~m.
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QUESTION #25 Torque and Equilibrium
A cube having a side of 10~cm with unknown mass and 200~gm mass were hung at two ends of an uniform rigid rod of 27~cm long. The rod along with masses was placed on a wedge keeping the distance between wedge point and 200~gm weight as 25~cm. Initially the masses were not at balance. A beaker is placed beneath the unknown mass and water is added slowly to it. At given point the masses were in balance and half volume of the unknown mass was inside the water. (Take the density of unknown mass is more than that of the water, the mass did not absorb water and water density is 1~g/cm³.) The unknown mass is ________ kg.
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Rankbit System
JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)

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