A small body is initially at a distance 'r' from
the centre of earth. 'r' is greater than the
radius of the earth. If it takes W joule of work
to move the body from this position to
another position at a distance 2r measured
from the centre of earth, how many joules
would be required to move it from this position
to a new position at a distance of 3r from the
centre of the earth.
1) W/5
2) W/3 3) W/2 4) W/6
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