![]() Once again, we’ll assume that the whole length of the bus crosses over onto the landing section before hitting the ground – so the front of the bus has to travel 90 ft, or 27.43 m. We have to find out whether it’s possible to jump the distance. In this scenario the highway section the bus lands on is at the same height as the section it jumps from. Let’s calculate what will happen if the bus jumps upwards at an optimal 45 degree angle (ignoring air resistance and other factors): The bus appears to pitch upwards just as it leaves the first section of highway (as if there’s an invisible ramp there). So if the bus lands flat on the far side, it will have fallen a vertical distance of about 7 metres. Now we can substitute this jump duration time t into the fall formula: To work out the time duration of the fall, we need to work out how long it will take the bus to cross the horizontal distance: H is the vertical fall distance, a is acceleration (in this case gravity, -9.81 m/s/s) and t is the time duration of the fall To work out how far the bus will fall, we can use the following formula: So now we have the speed of the bus in m/s, and the horizontal jump distance in metres. Next up, let’s convert the speed of the bus into km/hr and then m/s:īus speed = 80.45 km/hr × 1000 m / km / (3600 s / hr) The bus not only has to cross the 50 feet of the gap itself, but also another distance equal to the bus itself – the entire bus lands on the far side in the clip, not just the front bit.Ī typical city bus might be about 40 feet in length, so the total horizontal distance for the jump is 50 + 40 = 90 ft. To keep things simple, we’ll ignore air resistance and the dynamics of the bus rotating in the air. Scenario 2: The second scenario will be the “magical” ramp scenario where we assume that the bus manages to pitch upwards at an angle of 30 degrees, but has to land on a section of roadway at the same height. Scenario 1: The first one will be for the bus not pitching upwards but continuing straight and losing altitude to land on a lower section of roadway. Here we’ll analyse two probable scenarios. It’s also unclear exactly where the second piece of highway is in relation to the first – is it at the same level or significantly lower? The bus appears to “magically” pitch upwards as it leaves the first highway, as if there was a jump ramp set up for it. It’s very unclear exactly what the configuration of the jump is. That’s where the problems with this movie start. The lead characters Jack (Keanu Reaves) and Annie (Sandra Bullock) divert onto a highway in an effort to keep the bus above 80 km/hr.īut there’s a problem – a 50 foot (15 m) gap in the highway ahead. The Speed bus jump is probably one of the most infamous stunts in all movie history. ![]() ![]() It’s full of action stunt scenes, some of which are infamous for being highly unlikely or obviously faked. Speed is a classic 1994 action film where a bus full of civilians has to stay about 50 miles per hour (80 km/hr), or else a bomb planted there by the crazy villain will go off. ![]()
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