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Posted on 4/9/14 at 10:00 am to CurDog
Been done in many a movie.
Posted on 4/9/14 at 10:02 am to DownshiftAndFloorIt
quote:
The speedometer will actually get very close to zero. The car will be going the speed of the ramp.
Remember that relative to the ramp, it's only going 1 m/s. It would have to instantly accelerate to 60mph relative to the ramp to double it's speed relative to the ground. Aint happening.
In real life, sure. But in his scenario the tires had perfect traction and all that jibba jabba.
Posted on 4/9/14 at 10:03 am to LSUBoo
quote:
But in his scenario the tires had perfect traction
You would also need infinite horsepower.
Posted on 4/9/14 at 10:06 am to TU Rob
quote:
Similar concept, but they did this on MythBusters about Knight Rider.
LINK
quote:
--------------------------------------------------------------------------------
When the truck is moving, the main difficulty of course is the speed difference between the truck's ramp and the road. The Mythbusters, once again, have shown that this is possible, even demonstrating the trope with a car and a truck. SCIENCE! This is due to the fact that while there is indeed a big difference to the speeding tires from the transition of passing road to static truck, the car's overall inertia is enough to overcome this and decelerates the tires. In this case, only the speed of the overall mass of the car matters, relative to the truck; the wheel speed is irrelevant.
Here is the clip.
Posted on 4/9/14 at 10:12 am to CocomoLSU
Did they keep the throttle of the car at the same position or let off when they got onto the ramp? Can't watch a video right now, sorry.
Posted on 4/9/14 at 10:12 am to CocomoLSU
Sweet.
Cake..., plus the car was already a mess.
Cake..., plus the car was already a mess.
Posted on 4/9/14 at 10:13 am to CurDog
quote:
much better example
It's not a much better example at all. I am not talking about achieving a greater speed than the ramp and then coasting into/onto it, I am talking maintaing constant throttle on a car assuming the tires can maintain traction.
Posted on 4/9/14 at 10:15 am to toosleaux
It all depends on the car's power and traction. With perfect traction and regular power you get the same result you get in those videos.
Actually in your example the car might roll back down the ramp. It might not have enough arse to even start going up.
Actually in your example the car might roll back down the ramp. It might not have enough arse to even start going up.
Posted on 4/9/14 at 10:23 am to toosleaux
It's acceleration reletaive to the ramp would change. Change in acceleration would create a force (F=MA). This force would quite possibly just stall out the engine or just cause the tires to spin depending on the speeds. It's similar to putting a car's rear wheels on jack stands and flooring it, then tipping it over.
Posted on 4/9/14 at 10:23 am to toosleaux
Had a similar question like that on a test years ago. My answer was incorrect.
Posted on 4/9/14 at 10:27 am to DownshiftAndFloorIt
quote:I think you would need torque more than horsepower.
You would also need infinite horsepower.
Posted on 4/9/14 at 10:30 am to toosleaux
quote:
Did they keep the throttle of the car at the same position or let off when they got onto the ramp? Can't watch a video right now, sorry.
The car's inertia slows the tires immediately when they hit the ramp. So basically it just drives up the ramp and into the truck like normal.
They do it at like 35 mph, then again at 55 mph. Then go in reverse out of the truck and down the ramp.
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