You can always see a group of people pulling carts on TV.

Analysis: The movement of the car falling off the cliff is a flat throwing movement. Because the number of films shown per second is certain, in order to make the falling effect of the model car realistic, the number of films actually shot should be the same as the number of films actually shot, so the relationship between the flying time of the model car and the flying time of the real car can be solved by determining the meaning of the question. H ∝ t 2 and h = h real numbers can be obtained from h = gt 2. So there is t-norm = t-reality, so the number of films taken per second in actual shooting should be five times that in real shooting. Because the flying time of the model car is the flying time of the real car, and the flying distance of the model car in the horizontal direction is the flying distance of the real car in the horizontal direction, we can get v 0-norm = v0-reality from x = v0t, that is, the driving speed of the model car before falling off the cliff should be the actual driving speed of the real car.