The angular speed of a flywheel is increased from 600 rpm to 1200 rpm in 10 s. The number of revolutions completed by the flywheel during this time is :
Keywords:#flywheel angular speed 600 to 1200 rpm revolutions#NEET 2026 Code 12 Q38#System of Particles and Rotational Motion NEET 2026#Rotational Kinematics Equations NEET 2026
More System of Particles and Rotational Motion Previous-Year Questions
Q20neet_2024_05_may_morningMoment of Inertia of a Ring
A thin wire of length ' L ' and linear mass density ' m ' is bent into a circular ring (in x - y plane) with centre ' C ' as shown in figure. The moment of inertia of the ring about an axis yy' will be :
Circular ring formed by wire of length L with axis yy' tangent to the ring.
A.3mL³8π²$\frac{3\mathrm{mL}^3}{8\pi^2}$
B.3mL³8π$\frac{3\mathrm{mL}^3}{8\pi}$
C.3mL²8π²$\frac{3\mathrm{mL}^2}{8\pi^2}$
D.3mL²8π$\frac{3\mathrm{mL}^2}{8\pi}$
Solution
Related Formula
M = m L$M = m L$
L = 2π r ⇒ r = (L)/(2π)$$L = 2\pi r \Rightarrow r = \frac{L}{2\pi}$$Iyy' = Idia + M r² = (1)/(2) M r² + M r² = (3)/(2) M r²$$I_{yy'} = I_{\text{dia}} + M r^2 = \frac{1}{2} M r^2 + M r^2 = \frac{3}{2} M r^2$$
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