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A particle hanging from a spring stretch...

A particle hanging from a spring stretches it by 1 cm at earth's surface. How much will the same particle stretch the spring at a place 800 km above the earth's surface/ Radius of the earth=6400 km.

A

0.79 cm

B

0.1 cm

C

`pi // 6 "rad"//"hr".`

D

`2pi // 7 "rad"//"hr".`

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