The following Topics and Sub-Topics are covered in this chapter and are available on MSVgo:
The following Topics and Sub-Topics are covered in this chapter and are available on MSVgo:
Introduction
You must have heard about the terms ‘motion’ and ‘rest.’ These are frequently used words in physics that deal with the momentum of a body. The concept of motion and rest only applies to objects that have mass. Motion and time are interdependent quantities put on paper in terms of mathematical numbers. The SI unit of speed and velocity is metres per second.s in detail.
Motion is the physical quantity used to describe the state of any body’s momentum w.r.t. a reference point. Now this reference point can be a very ambiguous term for new learners. A person sitting inside a train can be both in rest and motion simultaneously w.r.t. two different reference points. Let us have a look at this concept of the reference point with this same example.
It is a stationary point that determines the motion of any object. Let’s take the above example of a man sitting inside a moving train. If we look at the man from outside the train, we can find him moving in the train’s direction. Hence, for the outside viewer, the man is in motion. But suppose we look at him from the perspective of the other man sitting right in front of him. Then he is at rest w.r.t. that man. The reference point is a significant factor in physics motion concepts.
Both the concepts of speed and velocity describe the motion of any object. We can have slow or fast speed categorisation under speed. The basic difference between speed and velocity is the inclusion of direction; speed is a scalar quantity and doesn’t provide the direction’s details. In contrast, velocity is a vector quantity that has a fixed direction. Speedometer and odometer are fundamental in measuring speed.
We have different types of speed according to how they behave w.r.t. time.
Average speed = Total distance travelled/Total time taken.
Time is a scalar quantity measured in seconds, which is its SI unit. We have certain conversion factors as listed below:
It’s a graph used to represent the distance and time relationship for any object. You can figure out the distance travelled, average speed, and type of speed with the distance-time graph. The distance-time graph depicts the speed of any object under a set of time intervals.
Periodic motion is the motion that happens recurrently with time. The movement of the swing and the pendulum are examples of periodic motion. They have a nature to oscillate between two endpoints. That means that a car moving uniformly between point A and point B in a straight line also comes under periodic motion, as the vehicle is fluctuating between an extreme fixed point at regular time intervals. Unless left undisturbed by other external forces, the periodic motion continues till time infinity.
Motion and time are an essential physics topic that forms the base of studying the mechanics and kinematics concepts. Motion always has a reference point. Speed and velocity are concepts that describe motion. Speed is the distance travelled by an object per unit of time and is a scalar quantity. We can have uniform speed motion or non-uniform speed motion.
You can find many intuitive video tutorials regarding the various types of motion on the MSVgo app. The concepts such as circular motion and periodic motion are easy to understand through the engaging video tutorials.
