Question Bank – Laws of Motion

 

Question Bank – Laws of Motion

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1. Very Short Answer Questions (1 Mark)

1. State Newton’s first law of motion.

   • Answer: An object remains at rest or in uniform motion in a straight line unless acted upon by an external force.

2. What is inertia?

Question Bank – Work, Energy, and Power

 

Question Bank – Work, Energy, and Power

1. Very Short Answer Questions (1 Mark)

1. Define work.

   • Answer: Work is said to be done when a force is applied to an object, and the object displaces in the direction of the applied force.

2. What is the SI unit of work?

   • Answer: Joule (J).

3. State the condition for work to be zero.

Physics Question Bank – Gravitation

Question Bank – Gravitation

1. Very Short Answer Questions (1 Mark)

1. What is the value of the universal gravitational constant (G)?

   • Answer: $6.674 \times 10^{-11} \, \text{Nm}^2/\text{kg}^2$

2. State Newton’s law of gravitation.

   • Answer: Every particle in the universe attracts every other particle with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

Motion in one dimension - an overview

1. Position and Displacement:

Position:

Location of an object relative to a reference point.

Displacement:

Change in position; includes direction and magnitude.

Introduction to Kinematics

Kinematics is the branch of physics that studies the motion of objects without considering the forces causing that motion. It's the science of describing and analyzing the motion of objects, including their position, velocity, and acceleration, without delving into the forces that produce that motion. By focusing solely on the motion itself, kinematics provides a fundamental framework for understanding various physical phenomena, from the motion of planets and stars to the movement of atoms and particles.

CBSE Class XI Physics: Dimensional Analysis Notes

Chapter: Units and Measurements

Topic: Dimensions and Dimensional Analysis

1. Dimensions of Physical Quantities

Dimensions of a physical quantity are the powers to which the fundamental units (base quantities) must be raised to represent that quantity.

1.1 Fundamental Quantities and Their Dimensions

The international system of Units (SI)

 The International System of Units (SI), also known as the metric system, is the modern form of the metric system and the most widely used system of measurement worldwide. It provides a standardized framework for measuring physical quantities, ensuring consistency and precision across scientific, industrial, and everyday applications. The SI system is maintained by the International Bureau of Weights and Measures (BIPM) and has undergone significant historical developments and refinements since its inception.

Historical Developments

Origins