> Q. Assertion : The length of the day is slowly increasing. Reason : The dominant effect causing a slowdown in the rotation of the earth is the gravitational pull of other planets in the solar system. – LIVE ANSWER TODAY

Q. Assertion : The length of the day is slowly increasing. Reason : The dominant effect causing a slowdown in the rotation of the earth is the gravitational pull of other planets in the solar system.

In This post you will get answer of Q.
Assertion : The length of the day is slowly increasing. Reason : The dominant effect causing a slowdown in the rotation of the earth is the gravitational pull of other planets in the solar system.

Solution:

Angular speed of earth is given by

$omega=frac{2pi}{T}$

hence, length of day $(T)$ depends upon angular speed $(omega)$ of earth, about its own axis.

Also, Kepler’s second law of motion which is also law of conservation of angular momentum holds true for sun-earth system. Hence, earth’s rotation is not slowing down.

Leave a Comment