what quantities are needed to describe motion -is it to know how position changes with time
what are 2 pictorial methods to describe motions??
To describe motion, you need to know how position changes with time. However, in order to fully capture the characteristics of motion, you also need some additional quantities. These quantities are:
1. Displacement: It refers to the change in position of an object in a particular direction. Displacement is a vector quantity, meaning it has both magnitude (size) and direction.
2. Velocity: It is the rate at which an object's displacement changes. Velocity is defined as the displacement divided by the time taken to cover that displacement. Velocity is also a vector quantity, as it includes both magnitude and direction.
3. Speed: It is the magnitude of velocity, i.e., the rate at which an object covers a distance. Unlike velocity, speed is a scalar quantity as it does not include direction.
4. Acceleration: It represents the rate at which an object's velocity changes. It is defined as the change in velocity divided by the time taken. Acceleration is also a vector quantity, including both magnitude and direction.
Now, regarding the two pictorial methods to describe motion:
1. Displacement-Time Graph: It represents the change in an object's position (displacement) with respect to time. In this graph, the y-axis represents displacement, and the x-axis shows time. The slope of the graph at any point gives the object's velocity at that particular time.
2. Velocity-Time Graph: It illustrates an object's velocity with respect to time. Here, the y-axis represents velocity, and the x-axis represents time. The area under the graph represents the object's displacement.
These graphs provide a visual representation of how motion changes over time and are useful tools for analyzing and understanding different aspects of motion.