Question

if the mass becomes two times the initial value
​

Answer 1

Answer:2x

Step-by-step explanation:

Answer 2

Answer:

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Class 11

>>Physics

>>Gravitation

>>Newton's Law of Gravitation

>>If the mass of earth and radius suddenly

Question

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If the mass of earth and radius suddenly become 2 times and 1/4

th

of the present value, the length of the day becomes:

Hard

Solution

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Correct option is D)

If mass of earth becomes 2 times and radius of earth becomes

4

1

of the present value moment of inertia of earth I=

5

2

mR

2

becomes

8

1

of the present value. As no external torque acting on the earth its angular momentum L=Iw=I

T

2π

remains constant. As I becomes

8

1

of present value so length of the day T becomes

8

1

of present day or 3 hours.

Step-by-step explanation:

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