Question

Assertion :The f=value of escape velocity from the surface of earth at ${30}^o$ and ${60}^o$ is $v_1=2v_e$, $v_e=2/3v_e$. Reason: The value of escape velocity is independent of angle of projection.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is D Assertion is incorrect but Reason is correct

Assertion statement is false whereas the reason statement is true.

As the value of escape velocity does not depend on the angle of projection, that's why $v_1$ and $v_2$ must be same and equal to the escape velocity.

$\therefore$ $v_1=v_2=v_e$