Motion and Laws of Physics.
Motion refers to the change that is the change in position of an object over time exposition of an object overtime. Motion and force behind the motion is a basic component of physics. We are able to define motion in terms of speed, velocity and acceleration, and from graphs we can also see how things change.
1. Speed
What is Speed?
The rate at which an object moves is referred to as speed. It shows us how many miles, kilometres, or units of distance an object can cover when given a particular period of time.
Formula:
Speed = Distance / Time
Units:
The unit of measuring speed is meter per second (m/s) or kilometer per hour (km/h).
2. Velocity
What is Velocity?
Velocity is like the speed, but at the same time, it has the direction of motion too. It is a vector quantity, that is, it has magnitude, which is speed, in addition to direction.
Formula:
Velocity = Displacement / Time
Units:
In meters per second (m/s)) in a particular direction.
3. Acceleration
What is Acceleration?
The rate at which change in velocity of an object occurs in relation to time is referred to as acceleration. Objects can accelerate through speeding up, slowing down, changing the direction.
Formula:
Acceleration = Veclocity Difference / Time.
Units:
In units of meters per second squared (m/s²).
4. Graphs of Motion
Graphs are good for illustration of motion. Different types of graphs can represent the changes in the position, velocity, and acceleration of an object in terms of time.
Distance-Time Graphs:
These graphs illustrate the variation of distance travelled by an object with time. Straight-line movement represents constant speed whereas curved movement means varying speed (acceleration or deceleration).
Velocity-Time Graphs:
These graphs illustrate the process of changing the velocity in time. The gradient or the slope of the line in a velocity-time graph is an acceleration. A flat line is representative of constant velocity.
Acceleration-Time Graphs:
These are graphs that indicate the change in acceleration with time. Horizontal line shows constant acceleration. while a sloped line shows varying acceleration.