# the length of a straight line path between two points is the.. a. speed b. area c. distance d....

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The Length of a Straight Line Path Between Two Points is the.. a. Speed b. Area c. Distance d. Volume Slide 2 Which of the Measurements Shown Below are Distance? a. 32 ft b. 68 km/hr c. 12 cm/s d. 68 s Slide 3 Which of the Following Are Speeds(Choose one)? a. How fast a car moves b. Length of a Race Track c. Path of an Elevator d. Rate a Person Slides Down a Rope Slide 4 A Rocks Mass Is A a. Chemical Property b. Physical Property c. Constant Property d. All of the Above Slide 5 Because speed is a Measure of Distance Traveled Per Unit Time, Units for Speed are.. a. M/s b. Cm/h c. Mi/h d. Ft/min e. M/h f. All of the Above Slide 6 Which of the Following Describe Both Speed and Direction(Choose one)? a. 65 m/s for and Hour b. 35 mi/h North c. 9.8 m/s Down d. 3.25 cm to the Right e. 53.7 km/h up f. 4.1 m/s to the East Slide 7 Which of the Following is Harder to Stop? a. A baseball traveling at 60 mi/hr b. A car rolling at 5 mi/hr Slide 8 Motion Chapter 10 Slide 9 Objectives Explain the relationship between motion and a frame of reference. Relate speed to distance and time. Distinguish between speed and velocity. Solve problems related to time, distance, displacement, speed, and velocity. Slide 10 Motion Motion (Quick Time Movie) = Objects change in position relative to a reference point Motion Displacement = Change in the position of an object Distance measures the path taken. Displacement is the change of an objects position. Displacement must always indicate direction. Quick Time Movie Relative Motion Slide 11 Distance Vs. Displacement Slide 12 Velocity Objectives Describe the concept of acceleration as a change in velocity. Explain why circular motion is continuous acceleration even when the speed does not change. Calculate acceleration as the rate at which velocity changes. Graph acceleration on a velocity-time graph. Slide 13 Speed and Velocity Whats the difference between speed and velocity? Speed = How fast an object moves Velocity = Speed in a given direction Speed Speed = Distance Traveled Time to Travel the Distance SI Unit for Speed = m/s Constant Speed = Equal distance in Equal amounts of Time Speed Quick Time Movie Slide 14 Speed = distance/time (v = d/t) Quick time movie VelocityQuick time movie Velocity When Solving for Full Credit Given Info Write Equation Substitute Given Info Solve for Unknown Write Answer with Proper Units Always use correct Sig Figs and Scientific Notation!! Slide 15 Speed and Velocity Speed can be studied with Graphs and Equations Distance Time Graph Slope = Speed Slide 16 A car traveled 3.5 E 2 miles toward New York City for 5 hours. What was the velocity of the car? Slide 17 A car traveled 3.5 E 1 miles/hour for 4 hours toward Chicago. How far did the car travel? Slide 18 A plane travels 1.925 E 3 miles toward Colorado at a velocity of 5.50 E 2 miles/hour. How long has the plane been traveling? Slide 19 Constant Speed objects covering equal distances in equal amounts of time Instantaneous speed is the speed at a given point in time. What units do you measure speed in? mi/hr = English m/s = SI Unit km/hr = Metric Unit Slide 20 A car travels 4.0 E 1 km in 2 hours towards Nevada. What is the cars Velocity? a. 20 m/hr b. 20 km/hr c. 20 mi/hr South d. 20 km/hr towards Nevada 1234567891011121314151617181920 21222324252627282930 :20 Answer Now Slide 21 Scooter is driving down 9 th Street in his 1962 Corvette. He drives 1.2 E 2 meters in 1.7 E 1 seconds. Assuming that he does not speed up or slow down, what is his speed in meters per second? 1234567891011121314151617181920 21222324252627282930 a. 6 m/s down 9 th st b. 7 m/s down 9 th st c. 1.4 E -1 m/s d. 7 m/s 35 Answer Now Slide 22 Liesel Kunz is running along a track that is 2.51 E 2 meters long. It takes her 1.26 E 1 seconds to run the entire length of the track. What is her speed in meters per second? 35 1234567891011121314151617181920 21222324252627282930 a. 1.99 E 1 mi/s b. 1.99 E 1 m/s c. 5 E -2 m/s along the track d. 5 E -2 m/s Answer Now Slide 23 What changes with a change in direction: Velocity or Speed? 1. Velocity 2. Speed 8 1234567891011121314151617181920 21222324252627282930 Answer Now Slide 24 Can Speed Be Graphed? 1. Yes 2. No 5 1234567891011121314151617181920 21222324252627282930 Answer Now Slide 25 Speed can be graphed! Distance-time graph. Slope of the line = Average Speed Quick Time Movie Average SpeedQuick Time Movie Average Speed What is the average speed of the racecar? Slide 26 Constant Velocity: Moving Towards Frame of Reference Slide 27 Constant Velocity: Moving Away Frame of Reference Slide 28 Whats the only Difference? Slide 29 Distance Time Graph Slide 30 Slide 31 Velocity Combine velocities to determine the resultant velocity. Slide 32 Slide 33 Example Problem A motor boat traveling 4 m/s, East encounters a current traveling 3.0 m/s, North. a.What is the resultant velocity of the motor boat? b.If the width of the river is 80 meters wide, then how much time does it take the boat to travel shore to shore? c.What distance downstream does the boat reach the opposite shore? Slide 34 Conversions are Needed: English to Metric Speeds Dimensional Analysis SI Unit to Metric Speeds Metric Conversion In order to convert you need to use conversion factors and D.A 1 mile = 1.609 km = 1609 m 1 ft = 12 in = 30.48 cm = 0.3048 m 1 yd = 3 ft = 0.9144 m 1 in = 2.54 cm = 0.0254 m 1 hr = 60 min = 3600 s Slide 35 Convert the following English Standard Units to Metric Units. A football field is 100 yards long. How long is that in meters? Slide 36 If I were to hit a home run down the left side of Jacobs Field the ball would have to travel at least 3.25 E 2 feet. How far is that in Meters? Slide 37 A horse can gallop at a speed of 4.2 E 1 miles/hour. How fast can the horse gallop in meters/second? Slide 38 A race car can travel around 2.25 E 2 mi/hr. How many meters can it travel in 1.5 E 1 s? Slide 39 A person can walk about 3.1 mi/hr How many hours would it take them to travel 10 km?

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