Jul 31, 2018. That's very fast. If you could travel at the speed of light, you would be able to circle the Earth's equator about 7.5 times in just one second! On terra firma, we fall towards the center of the Earth at 9.81 meters per second per second. The Earth gets in our way, so we feel a force (our mass multiplied by how fast we are. or faster-than-l….