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Physics · SYSTEMS OF PARTICLES AND ROTATIONAL MOTION
हिन्दीMatch List-I with List-II: List-I (Physical Situation) List-II (Governing Relation / Consequence) A A diver in mid-air pulling limbs inward I Rotational kinetic energy increases due to internal muscular work B Net external force on a rigid system is zero II Linear momentum of CM remains constant C Net external torque on a rigid body is zero III Total torque is independent of origin D Child on rotating turntable folding arms IV Angular speed increases while angular momentum is conserved Choose the correct answer from the options given below:
Match List-I with List-II:
| List-I (Physical Situation) | List-II (Governing Relation / Consequence) | ||
|---|---|---|---|
| A | A diver in mid-air pulling limbs inward | I | Rotational kinetic energy increases due to internal muscular work |
| B | Net external force on a rigid system is zero | II | Linear momentum of CM remains constant |
| C | Net external torque on a rigid body is zero | III | Total torque is independent of origin |
| D | Child on rotating turntable folding arms | IV | Angular speed increases while angular momentum is conserved |
Choose the correct answer from the options given below:
Correct answer · Option 2
A-(IV), B-(III), C-(II), D-(I)
Explanation
A-(IV): Diver pulls limbs, reducing I and increasing omega; B-(III): When net force is zero, torque is independent of origin; C-(II): Linear momentum of CM is conserved when net force is zero (or angular momentum conserved); D-(I): In folding arms, rotational KE increases via muscular work.
