Assertion :The escape speed does not depend on the direction in which the projectile is fired. Reason: Attaining the escape speed is easier if a projectile is fired in the direction the launch site is moving as the earth rotates about its axis.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Although the escape speed does not depend on direction in which projectile is fired, attaining the escape speed is easier if a projectile is fired in the direction the launch site is moving as the earth rotates about its axis since it gives an extra advantage of the speed of the location with respect to a space fixed frame. For example, rockets are launched eastwards at Cape Canaveral to take advantage of its eastwards speed of 1500km/h due to earth's rotation.

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