how would you explain ... a puzzle

[The Gecko_imp]

1/2 a mile? When I'm coming home really late and don't want to wake the neighbors, I'll kill the engine and try to coast to my garage. That's proabably a bit less than 100 yards and I can't coast the entire way.

Admitted, my 1/2 mile is more like 1/4 mile ...

the car has a lot more mass therefore will coast longer @ same speed. just basic physics.

okay, back to basics,
energy e=mv^2, so much more in the car,
but that ain’t what matters, remember two stones (big and small) falling from a tower arrive at the same time at the ground because the acceleration is the same. What matters here is the deceleration (negative acceleration) d equal some factor for the friction times the speed (not the mass or energy’), so it comes to d = f x v.
If the friction in the tires, wheels, bearings, drag .... etc was the same, car and bike would decelerate the same way.
Therefore the question ... can the slick bike, with two small tires, and light weight slow down faster ?

You obviously need to gain some weight.

Nacho, if you knew my “figure” you would understand that any extra pound at any part of my frame would be a sin !