How Fast Is Mythbusters Rocket Sled?

The Mythbusters rocket sled hit 170 m/s — 612 km/h — to disprove the 'unstoppable force, immovable object' paradox. Their tests showed that with enough kinetic energy, even a heavily reinforced 'immovable' wall does, in fact, move — quite spectacularly.

The Mythbusters rocket sled was built using surplus military hardware and reached 170 m/s on a test track in the Mojave Desert.

• Faster than F1 cars
• Disproved the unstoppable force paradox