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Lesson 5 Motion_Lesson_Presentation.pptx

Slide decks on The difference between rotational and translational motion

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General Science Overview•
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Applications of Translational and Rotational Motion
Objectives: At the end of the lesson, the learners should be able to: 1. identify the linear and angular quantities used to describe translational and rotational motion; 2. compare and contrast translational and rotational motion; 3. demonstrate how translational and rotational motion are applied in human movement;
Review: • What were the key concepts discussed from the previous activity?
Activating Prior Knowledge TRUE/FALSE Floor Activity: Stand on the correct side
TRUE OR FALSE? Distance is how much ground an object has covered, regardless of direction. TRUE
TRUE OR FALSE? Displacement measures how far and in what direction an object is from its start point. TRUE
TRUE OR FALSE? Speed is a vector because it tells you how fast and in which direction something moves. FALSE
TRUE OR FALSE? The SI unit for both distance and displacement is the meter (m). TRUE
TRUE OR FALSE? Average acceleration in one-dimensional motion equals total displacement divided by the elapsed time. FALSE
TRUE OR FALSE? If the net force on an object is zero, it will either stay at rest or move at constant velocity TRUE
TRUE OR FALSE? Displacement is the rate at which an object’s velocity changes over time. FALSE
TRUE OR FALSE? Newton’s second law can be written as F = ma, which relates net force, mass, and acceleration. TRUE
TRUE OR FALSE? In uniform circular motion, although speed is constant, the velocity is changing because direction keeps changing. TRUE
TRUE OR FALSE? Centripetal acceleration in circular motion points away from the center of the circle. FALSE
Displacement the shortest distance between the initial and final position of an object. It is a vector quantity, meaning it has both magnitude and direction. The SI unit of displacement is the meter (m).
Velocity how fast something moves in a specific direction, making it a vector quantity that includes both magnitude and direction. It is calculated as the amount of displacement over time
Acceleration the rate at which an object changes its velocity. It is a vector quantity, meaning it has both magnitude and direction. Specifically, acceleration is calculated as the change in the velocity vector over a time interval.
Establishing Purpose Ask: Why study motion? Where is it applied? Students relate motion to dream jobs or real-life applications
Introducing New Concepts • Translational Motion - Translational motion is defined as the movement of all points of a moving body along the same line or direction. In this type of motion, there is no change in the object's orientation relative to a fixed point.
LINEAR DISPLACEMENT • Linear displacement refers to the movement of an object along a straight line, quantified as the shortest distance from its initial position to its final position.
LINEAR VELOCITY • Linear velocity is defined as the rate of change of displacement with respect to time when an object moves along a straight path. It is a vector quantity, meaning it has both magnitude and direction..
LINEAR ACCELERATION • Linear acceleration is the rate of change of velocity of an object in a straight line, measured in meters per second squared (m/s²)
Activity: Motion Commotion (Translational) • Walking zone setup (Start/Finish lines) • Learners walk with different patterns and speeds • Determine which physical quantity is being shown
Questions: 1. What is the difference between the previously learned concepts of displacement, velocity, and acceleration and the new concepts of linear displacement, linear velocity, and linear acceleration?
Questions: 2. Did all the motions follow a straight line? What does this imply?
Questions: 3. Since the motions involved straight lines and curved lines, the path is not uniform for all the examples. What is common among all the examples?
Processing Questions: Translational Motion • Compare displacements, directions, durations • Relate velocity to displacement and time • Characteristics: equal displacement, direction, velocity, acceleration • Definition of Translational Motion
• Angular displacement is defined as the angle (in units of radians, degrees, or turns) through which a body rotates around a center or axis of rotation. It is represented by the symbol θ, ϑ, or φ, and is considered a vector quantity, meaning it has both magnitude and direction.
ANGULAR VELOCITY • The angular velocity is the rate at which the angular displacement changes. It tells us how fast the object is rotating about its axis or revolving around a fixed point.
ANGULAR ACCELERATION • Angular acceleration is defined as the time rate of change of angular velocity. It measures how quickly an object’s rotation speeds up or slows down and is typically expressed in radians per second squared.
Activity: Motion Commotion (Rotational) • Spinning zone setup with Reference line • Learners perform spins at various speeds and directions • Relate motion to angular displacement, velocity, acceleration
Questions: 1. What is the difference between the previously learned concepts of linear displacement, linear velocity, and linear acceleration and the new concepts of angular displacement, angular velocity, and angular acceleration?
Questions: 2. What is common among all the example motions portrayed?
Questions: 3. Since the motions involved straight lines and curved lines, the path is not uniform for all the examples. What is common among all the examples?
Processing Questions: Rotational Motion • Compare points' linear displacement, direction, time • Define characteristics of Rotational Motion • Key difference: variation in displacement and direction
Translational Motion Rotational Motion Points have equal linear displacement Points have varying linear displacements Points travel in the same direction Points travel in varying directions Points travel with the same linear velocity Points travel with different linear velocities Points travel with the same linear acceleration Points travel with varying linear accelerations Linear displacement Angular displacement Linear velocity Angular velocity Linear acceleration Angular acceleration
Venn Diagram Activity • Learners draw Venn diagram of translational and rotational motion • Use previous examples and processing questions
Application Activity: Human Motion Video Analysis • Watch video before next class • Create table: Translational vs. Rotational Human Motions bit.ly/TransRotMove • Describe each action using all six physical quantities
Generalization • Class discussion: How do you differentiate translational and rotational motion?
Formative Assessment Sample Items • Multiple choice: Concepts of translational and rotational motion • Focus on definitions, examples, and physical quantities