rotation: 360/86,400=0.0041667deg/sec 0.0041667 * 0.004sec = 000016667degR circumference: 2pi * 6371km = 40,030km land covered by rotation: 40,030 / 360 =

rotation: 360/86,400=0.0041667deg/sec 0.0041667 * 0.004sec = 000016667degR circumference: 2pi * 6371km = 40,030km land covered by rotation: 40,030 / 360 = 111.194km/deg 0.000016667deg × 111.194 km/degree = 0.001854 km km to m: 0.001854km × 1,000 meters/km = 1.854 meters more like 0.001 miles. ... oh, woops. I see your answer is in kms. it was something like 0.46km/s.