if orbit of earth skrinks to half then duration of year will be
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It depends on whether or not Earth’s mass shrinks with its radius. Let’s assume that the mass stays the same, so that the Earth just compresses as its radius shrinks. We’ll also make the simplifying assumption that Earth is a sphere of uniform density.
Angular momentum is given by:
L=I×ωL=I×ω
where II is a quantity called moment of inertia and ω
is angular velocity (approximately 2π2π radians per 24 hours for planet Earth).
Angular momentum is given by:
L=I×ωL=I×ω
where II is a quantity called moment of inertia and ω
is angular velocity (approximately 2π2π radians per 24 hours for planet Earth).
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