Motion Concepts
Explore the fundamentals of motion, covering topics such as speed, position, displacement, distance, velocity, and more. Dive into the difference between speed and velocity, average speed calculations, instantaneous velocity, and how to measure motion in a specific direction. Enhance your knowledge with visuals and examples provided.
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Presentation Transcript
Review 1.This is the point that all motion will be measured relative to. A. Position B. Reference C. Displacement D. Distance
Review 2.A point some distance and direction from my reference point. A.Position B.Reference C.Displacement D.Distance
Review 3.The change in position. A.Position B.Reference C.Displacement D.Distance
Review 4.The total distance traveled. A.Position B.Reference C.Displacement D.Distance
Average Speed Speed of a Car Def: Total distance covered divided by the total time Path doesnot matter for speed! 100 80 Distance 60 40 What is the average speed of the car over 5 sec? Total distance/total time 60m/5sec = 12m/sec 20 0 0 sec 1 sec 2 sec 3 sec 4 sec 5 sec Time
Velocity Def: the speed of an object in a certain direction Vector quantity Units: m/s Slope of the position vs. time graph Symbol: V Example: 100mph to the East If the speed or direction changes, the velocity changes
Where is the car moving with the greatest velocity? (time frame) Velocity of a Car 100 80 Position 60 40 20 0 0 sec 1 sec 2 sec 3 sec 4 sec 5 sec Time
Speed vs. Velocity Speed Velocity Vector quantity Unit: m/s Slope of the position vs. time graph Symbol: v Scalar quantity Unit: m/s Slope of the distance vs. time graph Symbol: s
Instantaneous Velocity Def: the velocity of an object at a particular moment (snap shot) Example: the speed on the speedometer, and your direction
Questions What is the instantaneous velocity of the car at 3.5 sec? Velocity of a Car 100 80 Position 60 40 20 What is the average velocity of the car over 4 sec? 0 0 sec 1 sec 2 sec 3 sec 4 sec 5 sec Time
Questions A: Speed 1. Depends on time, distance, and direction 2. Only depends on time and distance 3. Has the units m/s 4. Can be found using the position vs. time graph 5. Can be found using the distance vs. time graph B: Velocity C: Both
Calculating Speed or Velocity Formula: Speed or Velocity(m/s) d S V d = = t t 1 1 Distance (m) Time (s)
4 4- -Step Approach to solving problems Step Approach to solving problems Step 1 Read the problem, list the variables what are you trying to find? Step 2 Write the formula Step 3 Plug-n-Chug, substitute numbers into the formula and solve Step 4 Write answer with correct units!
Class Practice What is the speed of an electric scooter that travels 20 meters in 2 seconds? A ball is thrown so that it travels 120 meters in 8 seconds. How fast did it travel?
Class Practice If a girl walks at a rate of 2 m/s, how long will she take to walk 100 meters? A motorcycle travels at 25 m/s for 10 minutes (600 s). How far does it travel?
Independent Practice / Exit Ticket 1. A Cheetah runs 120 meters in 2 seconds. What is its speed? 2. Turtles walk at a speed of 20 meters per hour. How long does it take a turtle to travel 10 meters? 3. Your bowling ball is rolling 2.5 m/s toward the pins. How long does it take to travel 12 m? 4. If it takes 5 minutes to drive to the store at 35 mph (miles per hour), how far away is the store?
CHALLENGE QUESTIONS Mindy drives 55 mph for 30 minutes and then drives 65 mph for 2 hours. How far does she drive? If Jim travels 13 km in 8 minutes, and Sarah travels 24 km in 17 minutes, who is going faster?
