Change

There was change in the air… ow! It was a penny, maybe the one Beethoven lost. How fast was the penny moving? Here things get complicated. Too little wind (we'll assume it is air, and not some other fluid) and the penny will not move. With some amount of wind sometimes you'll get the penny to scoot along the ground as friction (often the first thing to be tossed from an elementary physics problem) is overcome and the penny unsticks, at least for a while. More wind and the penny may exhibit saltation where it is (briefly) picked up before smashing back into the ground, maybe even rolling for a bit if it lands edgewise. A problem here may be that the "stickiness" of air changes with scale, something the Wright brothers ran into with small tests versus a real airplane (and was it real, or faked by the CIA on a soundstage on the moon?). No idea if this is a factor between things that usually saltate in air and the presumably larger penny.

An easier thing to do (if one has a wind tunnel) would be to try various pennies on various surfaces at various windspeeds. If anything trying to get things flung in a wind tunnel might be fun. Are there windspeeds at which pennies jump, or do things not work out for the flying penny plan due to ________? Oh also the surface can be important, apparently asteroid impact patterns could not be reproduced as those attempting the reproduction had been always smoothing out the target surface first. Leave it rough, right impact pattern reproduced. Roughness would be important for saltating pennies, as some sort of gravel would more easily allow the air to get under the pennies, while the worst case would be something like a smooth surface made damp by rain.

Critics may point out that the size of sand particles that saltate in air is pretty small compared to pennies, but they're no fun, or that the wind speeds required to move pennies might cause other problems at which point who cares about the pennies? Beethoven.