Because of g force and gravity
They are flaps on the back, mostly meant for race cars but people like the look of them on their cars. They are designed for high speeds. The air hits the spoiler and pushes down on it, pressing on the rear of the car. This prevents the back end from actually lifting up at high speeds.
no
Your average car can reach speeds of up to 230km\h. The highest speed reached ever by a car is 413km\h.
Impulse
A car that is jerking at high speeds probably needs a tune-up. Barring any major mechanical issue, this will solve the problem.
Speeds up, slows down or goes round corners.
Probably in need of a complete tune up.
It is a really nice fast and expensive car no it can reach speeds up to 300 mph!!!!
Don't back up a hill, drive up it.
A lot of power is required to go up the hill. In some vehicles, the A/C is turned off to conserve the power for motion. When you get to the top, it will kick back in at the higher speeds.
Thinking my car needs a tuneup its jerking and lunging over speeds of 20mph
speeds up a reaction or changes harmful gasses in car exhausts into harmless gasses