Physics

Problem

7.2 Choose the correct alternative : (a) Acceleration due to gravity increases/decreases with increasing altitude. (b) Acceleration due to gravity increases/decreases with increasing depth (assume the earth to be a sphere of uniform density). (c) Acceleration due to gravity is independent of mass of the earth/mass of the body. (d) The formula

-G M m\left(1 / r_{2}-1 / r_{1}\right)

is more/less accurate than the formula

m g\left(r_{2}-r_{1}\right)

for the difference of potential energy between two points

r_{2}

and

r_{1}

distance away from the centre of the earth.

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