Why force is directly proportional to mass product of the two object?

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

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

The slope of a velocity time graph over any interval of time gives the during that interval