Assertion : An astronaut in an orbiting space station above the earth experience weightlessness.
Reason : An object moving around the earth under the infuence of earth's gravitational force is in a state of 'free fall'

Explanation

(a) The normal force exerted by the astronaut on orbiting
space station is zero (until the astronaut exerts some
muscluar force). Therefore the apparent weight of
astronaut in an orbiting space station is zero. Astronaut
is called in a state of weightlessness. This is because
astronaut as well as space ship are freely falling bodies.
Statement -1 is true, statement -2 is true and statement
-2 is the correct explanation of statement -1.