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HomePhysics77. A uniform heavy disc is rotating at constant angular velocity ω about a vertical axis through its centre and perpendicular to the plane of the disc. Let L be its angular momentum.  A lump of plasticine is dropped vertically on the disc and sticks to it.  Which will be constant

77. A uniform heavy disc is rotating at constant angular velocity ω about a vertical axis through its centre and perpendicular to the plane of the disc. Let L be its angular momentum.  A lump of plasticine is dropped vertically on the disc and sticks to it.  Which will be constant

(a)    w

(b)   w and L both

(c)   L only

(d)  Neither w nor L

Ans. c

(49)

5/5 - (1 vote)

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12. An ideal gas is taken through the cycle A→ B → C → A, as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process C → A is

(a)      – 5 J (b)  – 10 J (c)   – 15 J (d)  – 20 J Answer-a (126)

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