force= mass × acceleration
Carbon compounds move through plants and animals, the ocean, the air, and throughout our planet. Carbon present in our atmosphere as carbon dioxide contributes to the"Greenhouse Effect" and related global warming. Carbon cycle used to described the flow of carbon in various form such as carbon dioxide CO2, organic matter, and carbonates through the atmosphere, body of water, terrestrial biosphere, and lithosphere.
Formula for stopping distance can be calculated by
here
now we can see from above equation that stopping distance depends on square of the speed.
So as we can see that here 30 mph and 60 mph, if the speed is double then the stopping distance will become four times more.