Which best describes his run?
From time 0 to 6, he went fast and then slowed down.
From time 6 to 10, he was at his slowest.
From time 12 to 14, he went very slow.
From time 14 to 18, he went toward the starting point.

To run the physics cart, the fan speed of the cart is manipulated. this is the (blank) variable. the cart accelerates due to the speed of the fan. acceleration is therefore the (blank) variable. a “constant” is a parameter that stays the same regardless of the variables. one parameter of the cart that is held constant is the (blank) .

Energy flows from the producer level to the level. is called

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?