If that actually was the rotational speed of Earth, our days would last roughly 20 minutes. 40 000 / 24 is closer to 1 600 km/h. You'd still get yeeted hard and die though. 107 278.87 km/h is the speed at which Earth orbits the Sun, and when that suddenly halts, we're all suddenly astronauts lol.
ok so i should have dug a little deeper then i guess XD .
i only briefly search up "how fast is the earth spinning"
but ya regardless... that still a lot considering the "instant" stop that would commence after the command was given.
the amount of energy released from such an event would be pretty massive.
i'd almost want to pay to see that , it would be 1 very spectacular show that is for sure.