Motion in one dimension.pptx
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The document discusses motion in one dimension, focusing on terms such as position, distance, and displacement. It outlines key concepts including the definition of one-dimensional motion, the frame of reference, and the differences between distance (scalar) and displacement (vector). Additionally, it provides examples and calculations related to these concepts, emphasizing direction in displacement.
Motion in one dimension.pptx
- 1. MOTION IN ONE DIMENSION REFERENCE FRAME, POSITION, DISPLACEMENT AND DISTANCE BY KEYURI GOVENDER
- 2. Questions to make you think 1)What is your understanding of the term motion in one dimension? 2) What is an example of one-dimensional motion? 3) What is your understanding of the term position? 4) What is the term used to describe the pathway between two points? 5) Is that the same as the difference between point A and point B ?
- 3. LEARNING OUTCOMES: Define what one dimensional motion is Describe the concept of a frame of reference and position Differentiate between distance and displacement Calculate distance and displacement in one dimensional motion Illustrate the difference between displacement and distance
- 5. MOVEMENT IN ONE DIMENSION Movement in one dimension refers to objects moving in a straight line. This can be vertically up/down or left/right Any other examples?
- 6. REFERENCE POINT AND POSITION
- 7. Reference point: is a point from which the position of an object is measured Position: is the place where an object is relative to the reference point - Symbol: x - SI unit: m - Vector - Positive or negative (relative to the reference point) A B
- 8. EXAMPLE:
- 9. Distance and displacement Displacement - Shortest distance between start and end point - Direction is measure from start to end point - Symbol: x (horizontal) y (vertical) - Vector quantity, therefore direction is important - It is measured from the start to the end point and includes direction - Vector direction can be positive or negative Distance - total length of the route - symbol: D (distance) - SI Unit: m - Scalar quantity, therefore the direction does not play a role. Thus it is always postive Distance is the length of the path followed by a moving object Displacement is the change in position with respect to the starting point
- 10. Displacement of an object is the change in its position (final position minus the initial position) x =x f x i Example: Komal walks to meet Kevin at his house before walking to school. What is Komal's displacement and what distance did he cover if he walks to school via Kevin's house?
- 11. Distance (D) =path travelled =400 m+500 m =900 m Displacement (x)=x f x I =100 m + 0 m =100 m =100 m (in the negative x direction)
- 12. References Siyavula (n.d) Natural science grade 8: motion on one dimension. Received from: https://www.siyavula.com/read/science/grade-8 Khan Academy (n.d.) Unit: one-dimensional motion. Received from: https://www.khanacademy.org/science/physics/one-dimensional-motion