Chapter 11: Motion Section 1 Part 2- Graphs of Speed Physical Science Chapter 11: Motion Section 1 Part 2- Graphs of Speed

Physical Science: Chapter 11, Motion Distance vs. Time Graphs ●Distance plotted on the y axis ●Time the x axis.

Physical Science: Chapter 11, Motion Distance vs. Time Graphs ●Distance vs. Time graphs with different speeds

Physical Science: Chapter 11, Motion Distance vs. Time Graphs ● Distance vs. Time graphs with different velocities

Physical Science: Chapter 11, Motion Distance vs. Time Graphs ● Calculating speeds from Distance vs. Time graphs ● You need to find the rise and the run of the graph

Physical Science: Chapter 11, Motion Distance vs. Time Graphs ● Draw a straight line through the graphed points. ● Pick ANY two points on the line. ● Find rise (Δy) ● Find run (Δx)

Physical Science: Chapter 11, Motion Distance vs. Time Graphs ● For distance vs. time graphs rise/run = distance/time

Physical Science: Chapter 11, Motion Distance vs. Time Graphs ● For distance vs. time graphs slope = distance/time = avg speed

Physical Science: Chapter 11, Motion Distance vs. Time Graphs ● Interpreting Distance/Time Graphs

Physical Science: Chapter 11, Motion Distance vs. Time Graphs ● Interpreting Distance/Time Graphs Describe how the object is moving. 1). 0 → A 2). A → B 3). B → end

Physical Science: Chapter 11, Motion Distance vs. Time Graphs ● Interpreting Distance/Time Graphs HOW is the object moving? 1). Away at steady speed 2). Not moving 3). Away at a faster speed

Physical Science: Chapter 11, Motion Distance vs. Time Graphs ● Interpreting Distance/Time Graphs What is the object’s speed? 1). 0 → A 2). A → B 3). B → end

Physical Science: Chapter 11, Motion Distance vs. Time Graphs ● Interpreting Distance/Time Graphs What is the object’s speed? 1). 0 → A 0.6m/s 2). A → B Zero 3). B → end 2.0m/s

Physical Science: Chapter 11, Motion Distance vs. Time Graphs ● Interpreting Distance/Time Graphs What is the object’s velocity? 1). 0 → A 2). A → B 3). B → end

Physical Science: Chapter 11, Motion Distance vs. Time Graphs ● Interpreting Distance/Time Graphs What is the object’s velocity? 1). 0 → A 0.6m/s away 2). A → B Zero 3). B → end 2.0m/s away

Physical Science: Chapter 11, Motion Distance vs. Time Graphs ● Interpreting Distance/Time Graphs Do Practice Problems p. 370 (1,2)

Physical Science: Chapter 11, Motion Distance vs. Time Graphs ● Interpreting Distance/Time Graphs Do Practice Problems p. 370 (1,2) 1). Red line has larger slope. slope = speed = 4 m/s 2). Green line has the smallest slope Green is moving slowest, blue is in middle, red is moving fastest.

Physical Science: Chapter 11, Motion Mini-Quiz #3 A car drives the 16km from SHS to OBHS in 0.5h. 1). What was its average speed? 2). What was its velocity? 3). How long would it take to travel the 20km to Tunica at 50km/hr ? 4). How far is it to Tupelo, if it took 2.5hr at 70km/hr?

Physical Science: Chapter 11, Motion Mini-Quiz #3: What is the object’s velocity ? 5). 0-4s 6). 4s-6s 7). 6s-10s 8). 10s-12s

Physical Science: Chapter 11, Motion Mini-Quiz #3 (Answers) A car drives from the 16km from SHS to OBHS in 0.5h. 1). What was its average speed? 32km/h 2). What was its velocity? 32km/h, EAST 3). How long would it take to travel the 20km to Tunica at 50km/hr? 0.4h 4). How far is it to Tupelo, if it took 2.5hr at 70km/hr? 175km

Physical Science: Chapter 11, Motion Mini-Quiz #3 (Answers) What is the object’s velocity ? 5). 0-4s (5m/s, away) 6). 4s-6s (0 m/s) 7). 6s-10s 8). 10s-12s (10m/s, back)

Physical Science: Chapter 11, Motion THINGS TO KNOW 1). What is a frame of reference? 2). What is the difference between displacement and distance? 3). What is the difference between speed and velocity? 4). What is the formula for average speed?

Physical Science: Chapter 11, Motion THINGS TO KNOW 5). What is instantaneous speed? 6). List three “frames of reference.” 7). Be able to calculate average speed, distance moved or time from the average speed formula. 8). Be able create distance-time graphs and to find average speeds.

Physical Science: Chapter 11, Motion Chapter 11 Section 1 Quiz 1). What two things does velocity show? 2). What is the difference between displacement and distance? 3). On distance-time graphs, which one is plotted on the y axis? 4). What is the formula for average speed?

Physical Science: Chapter 11, Motion Chapter 11 Section 1 Quiz 5). What is the difference between average and instantaneous speed? 6). How far will a ball roll, if it moves at 3.5m/s for 18 seconds? 7). What is the average speed of a car that travels 180km in 3h? 8). How long will it take a plane traveling at 1000km/h to travel 2750km?

Physical Science: Chapter 11, Motion Chapter 11 Section 1 Quiz Use the following graph to answer questions #9-11.

Physical Science: Chapter 11, Motion

Physical Science: Chapter 11, Motion Chapter 11 Section 1 Quiz 9). What is the object’s average speed from 3s to 7s? 10). What is the object’s average speed from 7s to 9s? 11). What is the object’s average velocity from 9s to 12s?

Physical Science: Chapter 11, Motion Chapter 11 Section 1 Quiz (Answers) 1). What two things does velocity show? (1 pt each) Speed AND direction of movement 2). Difference between displacement & distance? (2 pts) Distance is the total path (distance traveled); displacement is the distance from the starting point. 3). On distance-time graphs, which is on y axis?(2 pts) Distance

Physical Science: Chapter 11, Motion Chapter 11 Section 1 Quiz 4). What is the formula for average speed? (3 pts) Avg Speed = Distance/Time 5). Difference between average & instantaneous speed? (2 pts) Average speed is the total distance divided by total time; instantaneous speed is the speed at one specific time.

Physical Science: Chapter 11, Motion Chapter 11 Section 1 Quiz 6). How far will a ball roll, if it moves at 3.5m/s for 18 seconds? (2 pts) Distance = Avg Speed x time Distance = 3.5m/s x 18s = 63m

Physical Science: Chapter 11, Motion Chapter 11 Section 1 Quiz 7). What is the average speed of a car that travels 180km in 3h? (2 pts) Avg Speed = Distance = 180km = 60km/h Time 3h 8). How long will it take a plane traveling at 1000km/h to travel 2750km? (2 pts) Time = distance = 2750km = 2.75h Avg Speed 1000km/h

Physical Science: Chapter 11, Motion Chapter 11 Section 1 Quiz 9). What is the avg speed from 3s to 7s? (2 pts) rise = Δ y = 15m – 5m = 2.5m/s run Δ x 7s – 3 s

Physical Science: Chapter 11, Motion Chapter 11 Section 1 Quiz 10). What is the average speed from 7s to 9s? (2 pts) rise = Δ y = 15m – 15m = 0m/s run Δ x 9s – 7s

Physical Science: Chapter 11, Motion Chapter 11 Section 1 Quiz 11). What is the avg velocity from 9s to 12s? (4 pts) rise = Δ y = 0m – 15m = -5m/s run Δ x 12s – 9s VELOCITY is 5 m/s back to the starting point