Chronon

  Circular Motion is defined as the movement of an object along circumference of a circle. Some examples of circular motion are motion of moon around the earth, motion of a satellite in a circular orbit around the earth and motion of a cyclist on a circular tract etc. In last episode, we talked about acceleration. We learnt that change in velocity per unit time is known as acceleration. Now let's take a step ahead and find out on what factors change in velocity depends. From our previous episodes we know that velocity does not only depends on magnitude of speed, but it also depends on the direction of motion. That suggests that there are three ways to make change in velocity. If direction is kept constant and magnitude of speed is changed, velocity will change. If magnitude of speed is kept constant and direction is changed, velocity will change. and if magnitude of speed and direction are changed, velocity will change.   In a circular path, direction of motion cha...

Before starting the topic, we need to understand that, there are two kinds of motion, we mentioned in our previous blog, known as Uniform Motion and non-uniform Motion.  Let's suppose, a car is moving on a road. It covered 5 m distance in 1 second, 5 m in next one second and again 5 m in next one second. We can say that the car travelled equal amount of distance in equal interval of time. Hence, if the object cover equal distance in equal interval of time is called Uniform Motion. Similarly, suppose a car is moving in traffic. It covers 2 m in 1 second, 5 m in next one second and 0 m distance in next 1 second. We can say that, this car travelled unequal distance in equal interval of time. Hence, when objects cover unequal distance in equal interval of time are known as Non-Uniform Motion .  Now let's back to the topic. In an uniform motion velocity of any object remains constant. Hence, change in velocity per unit time is zero. But if the motion is non-uniform, the velocities ...

  We have observed moving objects around us. From the observation we know that some objects move faster than other and some slower. For example, a man walks slower than a biker and a train run faster than a bike. In physics, there are two ways to measure the motion known as; Speed and Velocity.   To measure how fast or slow an object is moving, we simply note the time taken by the object to cover a particular distance. Lesser the time is taken; greater speed will be or greater the time is taken lesser the speed is. Simply it is defined as, total distance travelled by an object in a time unit or total distance is covered in 1 second. SI unit of speed is m/s. mathematically speed is calculated as;  Speed = distance travelled (in meter) / time (1 second).   Speed is something we measure, how much an object can travel in a unit time. Now suppose, in a particular time, some distance has been travelled by an object. There are time intervals when speed of the object...

  The ancient Greek philosopher  Aristotle  had the view that all objects have a natural place like heavy objects wanted to be at rest on the Earth and the light objects like smoke wanted to be at rest in the sky and the stars wanted to remain in the heaven. He thought that a body is in its natural state when it is at rest and an external agent is needed to keep a body in constant motion otherwise the body will return to its natural state.  It was Newton who first proposed the laws of motions in (1687), in his well-known book the Principia.   Motion In  physics ,  motion  is the phenomenon in which an object changes its  position  over time. Motion is mathematically described in terms of  displacement ,  distance ,  velocity ,  acceleration ,  speed , and  time . We will discuss all these terms one by one in our upcoming episodes. Basically, four types of motions are found in nature.   ...