Explanation: Newton’s first law states that objects will maintain their state of rest or uniform motion unless acted upon by an external force. This property is often referred to as inertia.
Explanation: Inertia is the tendency of an object to resist changes in its state of motion. A book lying on a table remains at rest unless an external force (like someone pushing it) acts upon it, demonstrating inertia.
Explanation: Newton’s first law of motion is often referred to as the law of inertia because it describes how objects tend to remain in their state of rest or uniform motion unless acted upon by an external force.
Explanation: Newton’s second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This law is expressed mathematically as F = ma, where F is the force, m is the mass, and a is the acceleration.
Explanation: The SI unit of force is the Newton (N). One Newton is defined as the force required to accelerate a one-kilogram mass by one meter per second squared.
Explanation: This phenomenon can be explained by Newton’s first law of motion, which states that objects in motion tend to stay in motion unless acted upon by an external force. When the car suddenly stops, the passengers continue to move forward due to their inertia.
Explanation: Newton’s third law states that for every action, there is an equal and opposite reaction. This means that when one object exerts a force on a second object, the second object exerts a force of equal magnitude in the opposite direction on the first object.
Explanation: The upward motion of the rocket can be explained by Newton’s third law of motion, which states that for every action, there is an equal and opposite reaction. The expulsion of gases downwards creates a reaction force that propels the rocket upwards.
Explanation: This scenario exemplifies Newton’s third law, where the action is the swimmer pushing the water backwards, and the reaction is the water pushing the swimmer forward.
Explanation: When a bus suddenly starts moving, the passengers inside feel a backward jerk due to their inertia of rest. Their initial state was at rest, and when the bus accelerates forward, their bodies tend to remain at rest relative to the bus, causing the backward jerk sensation.
Explanation: Newton’s laws of motion are fundamental because they apply universally to all objects, regardless of their size, shape, or environment. They provide a foundational framework for understanding and predicting the behavior of physical objects.