PLEASE HELP COMPLETELY LOST

56 Speed and Velocity Key Question: In horizontal motion, how do we distinguish between speed and velocity and how do we represent these concepts mathematically? The role of time Time is important when describing motion, If another person traveled the same route in the journeys on the previous page, but took more or less time, the motion would be dilgreed because ther speed would be difstunt. A number Ine and a grid simply show an object's position in one dimension and two dimensions respectively. Wa can show the effect of time by plating a distance versus time graph or a ciplacement virus time graph. Distance and displacement are usually plotied along the y-axis whoress time is plotted wong the paris. * For motion in one dimension, distance traveled will always be positive as it is cumulative. Displacement can be positive or negative depending on whether the object is going away from the starting point or going back towards the starting point. Time always runs forward and so is always positive. I. Two horses staring at the same point and time move towards a nowly fled water trough Horse 1 trots of a steady speed 20 m to the wwir trough in 4 seconds. It drinks for 10 gocondi. It then trots 30 m back The way il came, taking & seconds. Finally, It toms around again and trots 20 m in 5 seconds, Horn 2 plods at a steady speed for 20 m to fe water rough and likes 8 seconds to get there, If spends & seconds Erinking. It then gallops 30 m back the way it came in 3 seconds and remains them airing goes, [a) In two different colors, plot the movement of the horses on the displacement-time graph below: DE Displacement [m) -10 -20 20 5 10 15 25 Time (al [b) What are the horses' displacements after 25 seconds? Horse 1:_ Horse 2: [c] What are the total distances the horses mow during this time? Horse 1: Horse 2: () Describe the difference between the lines created by the displacement of the two horses in the first 4 seconds; (e) Describe the difference between the lines created by the displacement of the 2 horses between the 14 and 17 second marks of the graph