What would happen if a Mars Bar hit the earth at 10,000 miles per hour?
10,000 mph = 4.5 km/s If it falls from space at that speed, this is a rather slow speed. However, it would probably melt while traversing the atmosphere (friction with air). At that slow speed, the friction might be insufficient to burn it up completely. Also, the air would probably succeed in slowing it down to its terminal speed in the troposphere (a speed of around 150 mph = 0.067 km/s). At that speed, the melted content of the package would have time to re-solidify, giving a confused bar of… something (the original layered texture might be lost). This object would be arriving too slow to create much of an impact (although you might disagree if you get it on the side of the head).
