The center-to-center distance between Earth and Moon is 384 400 km. The Moon completes an orbit in 27.3 days. (a) Determine the Moon’s orbital speed. (b) If gravity were switched off, the Moon would move along a straight line tangent to its orbit, as described by Newton’s first law. In its actual orbit in 1.00 s, how far does the Moon fall below the tangent line and toward the Earth?