# Week 5 Unit 5: Exercise

18. June 2024

The stopping distance of a car can be calculated using the following rule of thumb:

- The stopping distance of the car is the sum of the reaction path and the brake distance
- The reaction path depends on the speed. It can be calculated by the following rule of thumb: The reaction path in meter is equal to the speed in km/h times 3/10. - Example: Speed 50km/h � reaction path 15m
- The brake distance depends as well on the speed. Again there is a rule of thumb which is: brake distance in m is equal to the speed in km/h divided by 10 , the result has to be taken by the power of 2 - Example: Speed 50km/h � (50 / 10)**2 = 25m
- The stopping distance for a car with a speed of 50km/h is 15m + 25m = 40m

### Implement the following functions to calculate the stopping distance

- function
`reaction_path()`

which gets the speed in km/h as input, calculates the reaction path according to the above rule of thumb and returns the path in m - function
`brake_distance()`

which gets the speed in km/h as input, calculates the brake distance according to the above rule of thumb and returns the distance in m - function
`stopping_distance()`

which gets the speed in km/h as input, calls the above functions, adds their return values and returns this sum

Get a speed in km/h as input and output the stopping distance in m.