Assertion: Space rockets are usually launched | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The $Assertion$ is correct: Rockets are launched from west to east to take advantage of the Earth's rotational velocity,which helps in achieving o

Vedclass · Accepted Answer

If both $Assertion$ and $Reason$ are correct but $Reason$ is not a correct explanation of the $Assertion$.

Vedclass · Answer

(A) The $Assertion$ is correct: Rockets are launched from west to east to take advantage of the Earth's rotational velocity,which helps in achieving orbital velocity with less fuel.The $Reason$ is also correct: The effective acceleration due to gravity $g'$ is given by $g' = g - \omega^2 R \cos^2 \lambda$. At the equator,the latitude $\lambda = 0$,so $\cos \lambda = 1$,making $g' = g - \omega^2 R$,which is the minimum value.However,the $Reason$ does not explain why rockets are launched from west to east. The launch direction is based on the Earth's rotation,not the value of $g$ at the equator. Therefore,both are correct,but the $Reason$ is not the correct explanation for the $Assertion$.

$Assertion$: Space rockets are usually launched in the equatorial line from west to east.
$Reason$: The acceleration due to gravity is minimum at the equator.

Similar Questions

$Assertion$ : The Earth is slowing down and as a result the Moon is coming nearer to it.
$Reason$ : The angular momentum of the Earth-Moon system is not conserved.

The earth takes $24\; h$ to rotate once about its axis. How much time (in $min$) does the sun take to shift by $1^o$ when viewed from the earth?

The variation of acceleration due to gravity $g$ with distance $d$ from the centre of the earth is best represented by ($R =$ Earth's radius)

Particles of mass $100 \, g$ each are placed at the vertices of an equilateral triangle of side $20 \, cm$. How much work must be done to increase the separation between them to infinity?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

$Assertion$: Space rockets are usually launched in the equatorial line from west to east.$Reason$: The acceleration due to gravity is minimum at the equator.