A minimum height of 2.5R can be obtained. Therefore, if the loop height is 4 meters (radius 2 meters), the car must start at a height of 5 meters above the ground. just Create a loop. Of course, this assumes that there is no energy loss due to friction. With that in mind, we recommend starting a little higher.
But it’s not too expensive…
Actually, why cut it close? Would you like to start? many Higher and clear all doubts? The reason is that the faster the car, the greater the gravitational acceleration experienced by the driver within the loop.
Think about this. If you let go of the car so that it circles at the lowest speed, zero Force from the truck (FT). For a moment, you will feel weightless, or zero G. If the car is released from a height above 2.5R, its speed will be greater than the minimum speed at the top of the loop. Yet gravity alone is not enough to move in a circle. The truck will also have to push the car down. This results in a G force greater than zero.
Let’s go back to the actual stunt video. Comparing the loop to a bystander, it is estimated to have a radius of 2 meters. The car is clearly free from heights above a minimum of 5 meters, for example 8 meters. The force on the top of the loop (divided by the weight to find in grams) is 3 g. Humans can tolerate up to 20g, so it should be fine.
But what about going to the extreme? Bad things can happen if the starting value is too high and the loop is too small. What about a loop that is 20 meters high and has a radius of 1.5 meters? This creates a force of 21 g. It may look cool, but it can also be deadly. It’s not fun anymore.
