Motion Graphs: Distance-Time, Velocity-Time & Diagrams - Physics Class PDF

Rise and shine students!  REVIEW motion when its distance from a(n) _______________ 1. An object is in _______ reference point is changing. Speed can be calculated if you know the distance of an object travels 2. _________ in one u...

Rise and shine students!  REVIEW motion when its distance from a(n) _______________ 1. An object is in _______ reference point is changing. Speed can be calculated if you know the distance of an object travels 2. _________ in one unit of time. velocity 3. Speed in a given direction is ____________. Acceleration 4. ____________refers to the rate of change in velocity of an object. Physics Class  Learning Targets use visual representations to explain and analyze motion; state the relationship of distance-time graphs and displacement-time graphs,; and conduct a forum on mitigation and disaster risk reduction. Physics Class  Motion A continuous change in position with respect to a reference point for a particular time interval. Physics Class  Motion Physics Class  Motion DIAGRAMS GRAPHS Physics Class  Diagrams are visual representations that use pictures or symbols to illustrate and explain an idea or information Physics Class  Ticker Tape Diagram/ Dot Diagram The trail of dots is a representation of the object’s motion. The distance between the dots represents the speed of the object at a certain time interval. Physics Class  DOT DIAGRAM A A large distance between the dots means the object was moving fast during a time interval. DOT DIAGRAM B A small distance between the dots means the object was moving slow during a time interval. Physics Class  DOT DIAGRAM A DOT DIAGRAM B Equal distance means constant speed/constant velocity. NO ACCELERATION Physics Class  The speed of the object is increasing since the distance between the dots is getting larger. The speed of the object is decreasing since the distance between the dots is getting smaller. Physics Class  The speed is changing because the distance between the dots is also changing. Hence, there is acceleration. Physics Class  Interpretation of the different distances of dots Physics Class  Imagine a car with a leaky engine that drips oil at a regular rate. As the car travels through town, it would leave a trace of oil on the street. That trace would reveal information about the motion of the car. Renatta Oyle owns such a car and it leaves a signature of Renatta's motion wherever she goes. Analyze the two traces of Renatta's ventures as shown below. Assume Renatta is traveling from left to right. Describe Renatta's motion characteristics during each section of the diagram. Physics Class  Renatta decelerates from a high speed to low speed until she is finally stopped. She remains at rest for a while and then gradually accelerates until the trace ends. Physics Class  Renatta travels at a constant speed during the first-time interval and then gradually accelerates until the trace ends. Physics Class  Renatta moves with a constant speed in the first time interval. She then abruptly decelerates to a stop. She remains at rest for sometime and then moves with a constant speed, slower than the first speed. Physics Class  Motion Graphs a visual representation that uses lines to show how two or more sets of measurements related to each other. Physics Class  DISTANCE-TIME GRAPH Determines the change in the position of the object Tells you the journey of an object. ➔ SPEED At Rest Constant Speed Constant Speed Same increase in Steeper line= faster speed distance in a given time Physics Class  DISTANCE-TIME GRAPH Distance (m) Time (s) 0 0 10 20 10 40 40 60 20 80 0 100 1.When is the distance of the car at 40 m? 60 seconds 2.What is the distance covered by the car at 60 seconds? 40 m 3.When is the object at rest? Between 20 s and 40 s 4.What is the speed of the car at 20 seconds? 0.5 m/s 5.What is its speed after 100 seconds? 0 m/s Physics Class  DISTANCE-TIME GRAPHS On Saturday, Erin rode her bicycle to visit Caroline. Caroline’s house is directly east of Erin’s. The graph shows how far Erin was from her house after each minute of her trip. 1. Erin rode at a constant speed for the first four minutes of her trip. What was her constant speed? 200 m/min 2. What was Erin’s average speed for the entire trip? 160 m/min 3. What was her average velocity for the entire trip? 160 m/min, East Physics Class  DISTANCE-TIME GRAPH Physics Class  Marble Rolling at a Constant Velocity Physics Class Physics Class  DISPLACEMENT-TIME GRAPH The slope in a graph gives us an idea about the motion of an object. “steepness of the line” Physics Class Physics Class  Constant Constant negative At rest Velocity velocity “no motion” (opposite direction) Physics Class  The slope of the graph in Figure 11a is steeper than that in Figure 11b. This steeper slope indicates a faster velocity. Physics Class  DISPLACEMENT-TIME GRAPH: CHANGING VELOCITY Situation 1: Positive Changing Velocity Physics Class  DISPLACEMENT-TIME GRAPH: CHANGING VELOCITY Situation 2: Negative Changing Velocity Physics Class  Check For Understanding accelerating decelerating constant speed at rest ACCELERATING Its speed Segment 0-A The bus is ________________. changes from 0 to 10 m/s in 5s. CONSTANT SPEED Segment A-B The bus is moving at a _____________________ of 10 m/s for 5s. Segment B-C The bus is DECELERATING _______________. It is slowing down from 10 m/s to rest in 3s. AT REST It has stopped. Segment C-D The bus is ____________. ACCELERATING It is gradually increasing in speed. Segment D-E The bus is ________________. Physics Class Summary Physics Class  Thank you! I hope you enjoyed our online class! Stay at home! Keep safe and be safe! Physics Class