Question

Newton's laws of motion are:

  1. An object at rest will stay at rest, and an object in motion will stay in motion with the same speed and direction unless acted on by an external force.

  2. The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This can be stated as F = ma, where F is the force, m is the mass, and a is the acceleration.

  3. For every action, there is an equal and opposite reaction.

The SI unit of force is the Newton, symbolized by N.

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Answer

Newton's Laws of Motion

  1. First Law (Law of Inertia): An object at rest will remain at rest, and an object in motion will continue in motion with the same speed and direction unless acted upon by an external, unbalanced force. This law highlights the concept of inertia, which is the resistance of any physical object to any change in its velocity, including changes in the object's speed or direction.

  2. Second Law (Law of Force): The acceleration of an object is directly proportional to the net external force acting on it and inversely proportional to its mass. This relationship is expressed by the equation: $$ F = ma $$ where ( F ) represents the force, ( m ) is the mass of the object, and ( a ) is its acceleration. Thus, the greater the force, the greater the acceleration, and conversely, the greater the mass, the smaller the acceleration for a given force.

  3. Third Law (Action and Reaction): For every action, there is an equal and opposite reaction. This means that any interaction between two objects results in a pair of forces that are equal in magnitude but opposite in direction.

SI Unit of Force

The SI unit of force is the Newton (N).


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