IIT-JEE 2008 · Paper 1 · Physics Q35

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PhysicsAssertion and reason+3 / -1Question 35 of 69

STATEMENT-1: An astronaut in an orbiting space station above the Earth experiences weightlessness.

and

STATEMENT-2: An object moving around the Earth under the influence of Earth's gravitational force is in a state of 'free-fall'.

STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is a correct explanation for STATEMENT-1

STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1

STATEMENT-1 is True, STATEMENT-2 is False

STATEMENT-1 is False, STATEMENT-2 is True

Answer and worked solution

Official answer: A

Statement 2. Any object moving under gravity alone is in free fall. True.

Statement 1. The station and the astronaut fall together with the same acceleration $g$ at that height, so there is no normal reaction between them: the astronaut feels weightless. True, and it is a direct consequence of Statement 2.

(A)

Topics:Satellites and orbital motion

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IIT-JEE 2008 · Paper 1, Physics question 35