JEE MAIN - Physics (2018 - 16th April Morning Slot - No. 16)
Suppose that the angular velocity of rotation of earth is increased. Then, as a consequence :
Weight of the object, everywhere on the earth, will increase.
Weight of the object, everywhere on the earth, will decrease.
There will be no change in weight anywhere on the earth.
Except at poles, weight of the object on the earth will decrease.
Forklaring
With rotation of earth the effect on acceleration due to gravity vary as
g' = g $$-$$ $$\omega $$2 R cos2 $$\theta $$
Here $$\theta $$ is lattitude.
At poles $$\theta $$ = 90o so those will be no change in gravity.
At all other point $$\omega $$ will increase so g' will decrease.
g' = g $$-$$ $$\omega $$2 R cos2 $$\theta $$
Here $$\theta $$ is lattitude.
At poles $$\theta $$ = 90o so those will be no change in gravity.
At all other point $$\omega $$ will increase so g' will decrease.