Is the Earths rotation slowing down?
Yes, the rotation of the earth is slowing down. Each day (rotation) is longer than previous one. The effect is small – it will take about 59,000 years for the day to get one whole second longer every day, but already the tiny extra fractions of a second that accumulate per day over a whole year mean that “leap seconds” have to be added roughly once every eighteen months. Earths rotation is slowed due to the tidal action of the moon. The gravitational forces that drive the tides, get their energy from the Earth’s rotation, which winds down as a result.