A body is weighed with a spring balance in a train at rest, shows a weight W_0. When the train moves with a velocity υ around the equator form went to east, then what is the weight W shown by the spring balance if the angular velocity of the earth is ω ?

Q: A body is weighed with a spring balance in a train at rest, shows a weight W0. When the train moves with a velocity v around the equator form went to east, then what is the weight W shown by the spring balance if the angular velocity of the earth is ω ?

(a) $W_0(1-\frac{\omega v}{g})$

(b) $W_0(1-\frac{\omega v}{2g})$

(c) $W_0(1-\frac{2\omega v}{g})$

(d) $W_0(1+\frac{2\omega v}{g})$

Ans: (c)