Sure! Here’s a breakdown of each of your questions:
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Relationship Between Motion and Forces: Motion refers to the change in position of an object over time. Forces are interactions that can cause an object to accelerate, decelerate, or change direction. According to Newton's laws of motion, the motion of an object is directly related to the net forces acting upon it. When an unbalanced force acts on an object, it changes the object's state of motion, resulting in acceleration.
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Newton’s First Law of Motion: Newton's first law states that an object at rest remains at rest, and an object in motion continues in motion with the same speed and in the same direction unless acted upon by a net external force. This means that if there is no net force acting on an object, its velocity will not change; it will either stay still or keep moving in a straight line at constant speed.
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Inertia: Inertia is the property of an object that resists changes in its state of motion. This means that an object will not start moving, stop moving, or change direction unless a net force acts on it. Inertia is directly related to mass: the greater the mass of an object, the greater its inertia. Thus, more massive objects require larger forces to change their motion compared to less massive objects.
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Inertial Forces: Inertial forces arise when an observer is in a non-inertial reference frame (i.e., a frame that is accelerating). These forces are not real, physical forces, but rather apparent forces that are observed due to the inertia of the object. For example, in a car that is suddenly accelerating forwards, passengers may feel as though they are being pushed backward against their seats. This sensation is an inertial force.
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What is one Newton equal to?: One Newton (N) is the unit of force in the International System of Units (SI). It is defined as the amount of force required to accelerate a 1-kilogram mass by 1 meter per second squared (1 N = 1 kg·m/s²).