Question
Question: If the speed of rotation of earth about its axis increases, then the weight of the body at the equat...
If the speed of rotation of earth about its axis increases, then the weight of the body at the equator will –
A
Increase
B
Decrease
C
Remain unchanged
D
Sometimes decrease and sometimes increase
Answer
Decrease
Explanation
Solution
Due to rotation, the effective value of g is
g' = g – w2R cos2l. Now w increases so g' will decrease & so weight = mg' will reduce