If a velocity time graph is horizontal then acceleration is what?

Why does the input force have to be greater than the force needed to lift the bale?

Edward tolman explained the results of his study by theorizing that the rats were learning about the maze during every trial but they a. were agitated because other groups were getting reinforcement b. could not remember how to demonstrate it without reinforcement c. were not motivated to demonstrate it without reinforcement d. seemed to be too lazy to actually work without reinforcement

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?