JEE PHYSICS MCQ: GRAVITATION

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Given below are two statements:

Statement I : Rotation of the earth shows effect on the value of acceleration due to gravity

(\mathrm{g})

.

Statement II : The effect of rotation of the earth on the value of '

g

' at the equator is minimum and that at the pole is maximum.

In the light of the above statements, choose the correct answer from the options given below

View answer and explanation

Correct option: D

Statement I is true but statement II is false

Option D (Statement I is true but statement II is false) is correct because the effect of Earth's rotation on 'g' is maximum at the equator and minimum at the poles.

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The escape velocity for a body projected vertically upwards from the surface of the earth is

11.2\mathrm{\;\;km}{\mathrm{s}^{ - 1}}

. If the body is projected in a direction making an angle of

{45^0}

with the vertical, the escape velocity will be The escape velocity of a body projected from the surface of earth is

v_e

. If the body is projected at an angle

\theta

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Statement II: As observed by another astronaut's in the same satellite, force of gravity and centrifugal force balance each other. An iron ball and a wooden ball of the same radius are released from a height 'h' in vacuum. The time taken by both of them to reach the ground is