Newton's Laws Of Motion Video Lecture | Mechanics & General Properties of Matter - Physics

Ans. Newton's three laws of motion are: 1. The law of inertia: An object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an external force. 2. The law of acceleration: The acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass. It can be mathematically represented as F = ma, where F is the net force, m is the mass, and a is the acceleration. 3. The law of action and reaction: For every action, there is an equal and opposite reaction. This means that if object A exerts a force on object B, then object B exerts an equal and opposite force on object A.

Ans. Newton's first law of motion, also known as the law of inertia, can be observed in everyday life situations. For example: - When a car suddenly stops, passengers tend to move forward due to their inertia. - When a soccer ball is kicked, it continues to move until friction and air resistance slow it down. - When a person pushes a shopping cart, it keeps moving until a force (such as friction) stops it. These examples demonstrate how objects tend to keep their state of motion unless acted upon by an external force.

Ans. Newton's second law of motion states that the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass. This can be mathematically represented as F = ma, where F is the net force, m is the mass, and a is the acceleration. It means that the greater the force applied to an object, the greater its acceleration will be. Similarly, the greater the mass of an object, the smaller its acceleration will be for a given force.

Ans. Yes, an example of Newton's third law of motion is the action-reaction forces when a person jumps off a diving board. When the person pushes down on the diving board (action), the diving board exerts an equal and opposite force upward (reaction). This reaction force propels the person into the air. Another example is when a person walks. As they push their foot backward against the ground (action), the ground exerts an equal and opposite force forward (reaction) that propels the person forward.

Ans. Newton's laws of motion play a role in the concept of equilibrium. In equilibrium, the net force and net torque acting on an object are both zero. This means that the object is either at rest or moving with a constant velocity. Newton's first law of motion (law of inertia) explains why an object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an external force. In equilibrium, the forces and torques acting on the object are balanced, resulting in no acceleration or change in motion.