Q18 / 223 · NTA Abhyas (NEET) 2020 · Physics · Rotational Motion

On account of the earth rotating about its axis

Correct answer
A
the linear velocity of objects at equator is greater than at other places
B
the angular velocity of objects at equator is more than that of objects at poles
C
the linear velocity of objects at all places at the earth is equal, but angular velocity is different
D
at all places the angular velocity and linear velocity are uniform

Solution

(1)

as distance of surface is maximum from axis at equator, hence

v

is maximum as

v = ω \times r

(2)

angular velocity is same everywhere

(3)

as distance of surface is maximum from axis at equator, hence

v

is maximum as

v = ω \times r

(4)

as distance of surface is maximum from axis at equator, hence

v

is maximum as

v = ω \times r

Hence, the correct answer is option: 'A'.