A body is suspended from a spring balance kept in a satellite. The reading of the balance is W1, when the satellite goes in an orbit of radius R and is W2, when it goes in an orbit of radius 2R.
A
W1=W2
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B
W1<W2
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C
W1>W2
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D
W1≠W2
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Solution
The correct option is AW1=W2 For a body revolving around the earth at any orbital radius, the gravitational force towards earth is countered by centrifugal force as shown in figure. i.e. Fg=Fv So, for a body hanging in the satellite, W1+Fv=Fg⇒W1=0 Similarly, W2=0. Thus W1=W2.