A body is suspended on a spring balance in a ship sailing along the equator with a speed `v`. Show that the scale reading will be very close to `W_(0)(1 pm (2 omega v)/(g))`, where `omega` is the angular speed of the earth and `W_(0)` is the reading of spring balance when the ship is at rest. Explain the plus or minus sign
[Hint : `W_(0)=mg-momega^(2)R,W=mg-m((momega+v)^(2))/(R)` when the ship is moving from west to east]