# Gravitation

## A missile is launched with a velocity less than the escape velocity. The sum of its kinetic and potential energies is

A
positive
B
negative
C
zero
D
may be positive or negative depending upon its initial velocity
Medium
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## The ratio of acceleration due to gravity at a depth below the surface of earth and at a height above the surface for

A
is constant.
B
increases linearly with h.
C
varies parabolically with h.
D
decreases.
Medium
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## Consider Earth to be a homogeneous sphere. Scientist A goes deep down in a mine and scientist B goes high up in a balloon. The gravitational field measured by

A
A goes on decreasing and that of B goes on increasing
B
B goes on decreasing and that of A goes on increasing
C
each decreases at the same rate
D
each decreases at different rates
Medium
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