You carry a 20 n bag of dog food up a 6 m flight of stairs. how much work was done?

No work was done because it is not hard to carry a bag of dog food up the stairs.

Explanation:

The FitnessGram Pacer Test is a multistage aerobic capacity test that progressively gets more difficult as it continues. The 20 meter pacer test will begin in 30 seconds. Line up at the start. The running speed starts slowly, but gets faster each minute after you hear this signal. A single lap should be completed each time you hear this sound. Remember to run in a straight line, and run as long as possible.

prolly a beacuse the momentuem the car has increases while going down hill

no simpler subs form complex ones. synthesise = make