Buoyancy Force Buoyancy, or upthrust, is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. We have come across many daily life observations of sinking objects in water and floating on it. As boats, ships, plastic bottles and straws float on the surface of water, some […]
Buoyancy Force and Archimedes’ principle Read More »
Thrust In our fifth blog of the series, we discussed forces. As a force is any interaction when unopposed, will change the state of the object. From the same blog we are also familiar with the concept of net force. When a net force is applied in a particular direction in a small fraction of time
Thrust and Pressure Read More »
From the beginning of the series, we used the term ‘mass’ several times. As a beginner, one always confuses mass with weight. Well, there are very distinct differences in between them. Mass and weight have entirely different definition and characteristics. Mass Mass is more like amount of matter, the things it is made of, or
From our previous blog, we know that earth attract objects with a constant force. Whenever a constant force is applied, velocity starts changing. In our third blog of this series, we already have discussed that change in velocity per unit time is known as acceleration. In this case the acceleration is called acceleration due to
Acceleration Due to Gravity Read More »
From our previous blog, we know that everybody, possessing some mass, attracts each other. Newton derived a formula that can measure the strength of this attraction. He stated that every object in the universe attracts every other object with a force which is proportional to the product of their masses and inversely proportional to the
Universal Law of Gravitation Read More »
In part 5 of this series, we mentioned gravitational force under the types of fundamental forces. Today we are going to discuss the basic introduction of gravitation. In our everyday life we experience a number of activities, phenomena and incidents that happen under the influence of gravitation. We have observed that whenever a ball is thrown upward,
Introduction to Gravitation Read More »
So far, we have come across first and second law of motion. In first law of motion, we learnt that every object tends to remain in its state of motion, until an external force is compelled to change the state. In second low of motion, we described that the rate of change of momentum of
Third Law of Motion and Conservation of Momentum Read More »
As we discussed in previous blog, the first law of motion indicates that when an unbalanced external force acts on an object, its velocity changes, that is, the object gets an acceleration. From our everyday life observation, we know that, during the game of table tennis if the ball hits a player, it does not
Second Law of Motion and Momentum Read More »
We have observed that, if we put an object in motion it comes in state of rest. But if we put any object in state of rest it remains in that state. For example, if we throw a ball upward or roll it on the ground, it will ultimately come in the state of rest,
First Law of Motion and Inertia Read More »
From many centuries the problem of motion and its causes had puzzled scientists and philosophers until Galileo and Newton developed entirely different approach to understand motion. We have observed that, whenever an object is in motion it involves a form of hit, push or pull. In physics, a force is defined as any interaction such
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
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
Rate of Change of Motion Read More »
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
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
