When a body falls freely through air, the force acting on it due to gravity is neutralised by the opposite force of air resistance and the net force becomes zero. Why then does the falling body not stop falling but still keep falling with a constant velocity( terminal velocity)?

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When a body falls freely through air, the force acting on it due to gravity is neutralised by the opposite force of air resistance. So, the net force becomes zero. Why then does the falling body not stop falling but still keep falling with a constant velocity( terminal velocity)? A: This is one of the … Read more

What is Terminal Velocity?

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Q: What is Terminal Velocity? A: When a body falls freely in the air, from a height, it starts to accelerate because of gravity. At first, it falls faster and faster, but as its velocity increases, soon another force begins to act in the opposite direction — air resistance (drag). As the object speeds up, … Read more

What is the Difference Between Speed and Velocity?

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Q: What is the Difference Between Speed and Velocity? When we talk about how fast something is moving, we often use the words speed and velocity interchangeably. But in physics, these two terms have different meanings. Understanding the difference between speed and velocity is important if you want to get the basics of motion right. … Read more

What are Isotopes, Isobars, and Isotones?

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Q: What are Isotopes, Isobars, and Isotones? A: In chemistry and physics, you often hear the terms isotopes, isobars, and isotones while studying atoms and nuclei. These concepts may sound similar, but they describe different properties of atoms. Let’s understand them in a simple and easy way. Isotopes Definition: Isotopes are atoms of the same … Read more

What are Dalton’s Atomic Theory Postulates?

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Q: What are Dalton’s Atomic Theory Postulates? Dalton’s Atomic Theory, proposed in the early 19th century, is one of the foundations of modern chemistry. It explains the nature of matter and how elements combine to form compounds. The key postulates are: Did You Know?John Dalton was also a school teacher and had colour blindness. The … Read more

What is the difference between an element, a compound, and a mixture?

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Q: What is the difference between an element, a compound, and a mixture? A: Understanding the difference between an element, a compound, and a mixture is one of the basic foundations of chemistry. These terms may sound similar, but they describe very different types of substances. Let’s break them down simply and clearly. What is … Read more