9.8m/s^2 isn’t a speed. It’s a rate of acceleration; it tells you how fast your speed is changing. The minimum speed an object can impact the planet is equal to “escape velocity”—the speed you’d need to launch an object from the surface so it escapes the Earth’s gravity permanently. In the Earth’s case, that speed is about 40,000 km/hr or 25,000 mph.
9.8m/s^2 isn’t a speed. It’s a rate of acceleration; it tells you how fast your speed is changing. The minimum speed an object can impact the planet is equal to “escape velocity”—the speed you’d need to launch an object from the surface so it escapes the Earth’s gravity permanently. In the Earth’s case, that speed is about 40,000 km/hr or 25,000 mph.