Drive Free or Die
Drive Free or Die

Watch A Lego Car Race A Porsche 911 And Win

First off, let me just warn everyone here, Lego's cheating a little bit. But, seeing as how the race is so unbalanced to begin with, that's probably okay. And, in the end, there's sort of a physics lesson to be learned, so I guess we're all winners.

If the video doesn't work for you, try watching it here.

Now, I'm actually not totally certain about the physics lesson being given here. The host suggests the Lego car was able to out-accelerate the rolling 911 because of its less mass, but, as astronaut David Scott showed us on the moon, mass is not a factor for gravitational acceleration:

If I had to guess, I'd say the Lego car was able to out-accellerate the Porsche because of less mechanical rolling resistance and air resistance, due to its much smaller frontal area. Maybe I'm wrong? Any physics-types want to chime in?

DISCUSSION

Flavien Vidal

Their explanation is crap. The size of the wheels is what matters the most here.

Small wheels are able to accelerate quicker and get up to their top speed faster. While big wheels take a lot more time to get up to speed but have more momentum (ie: if it flatens out, the car will keep its speed a lot longer than if it was equipped with smaller wheels)

Source: 11 years of downhill skateboard, playing with wheels of different sizes.

(PS: of course, before anyone screams at me telling me that the mass in movement is what keeps the momentum: I know! But in this case I'm refering to the size of the wheels as it is, I think, the most important here.)

For more information on gravity and wheel size, I advise you to contact Chris Chaput who will I'm sure, happily geek out for hours explaining how gravity/wheelsize/momentum works. chris AT abec11.com