There is in general relativity: https://en.wikipedia.org/wiki/Proper_acceleration https://en.wikipedia.org/wiki/Proper_acceleration "Similarly, standing on a n

There is in general relativity: https://en.wikipedia.org/wiki/Proper_acceleration https://en.wikipedia.org/wiki/Proper_acceleration "Similarly, standing on a non-rotating planet (and on earth for practical purposes) observers experience an upward proper-acceleration due to the normal force exerted by the earth on the bottom of their shoes."