![]() Real forces have a physical origin, whereas fictitious forces occur because the observer is in an accelerating or noninertial frame of reference. ![]() The force developed in a spring obeys Hooke’s law, according to which its magnitude is proportional to the displacement and has a sense in the opposite direction of the displacement. Given Newton's third law, why is there motion at all Should not all forces even themselves out, so nothing moves at all When I push a table using my finger, the table applies the same force onto my finger like my finger does on the table just with an opposing direction, nothing happens except that I feel the opposing force.The force of friction is a force experienced by a moving object (or an object that has a tendency to move) parallel to the interface opposing the motion (or its tendency).If the object is accelerating, tension is greater than weight, and if it is decelerating, tension is less than weight. When a rope supports the weight of an object at rest, the tension in the rope is equal to the weight of the object. The pulling force that acts along a stretched flexible connector, such as a rope or cable, is called tension.When an object rests on an inclined plane that makes an angle \(\theta\) with the horizontal surface, the weight of the object can be resolved into components that act perpendicular and parallel to the surface of the plane.When an object rests on a nonaccelerating horizontal surface, the magnitude of the normal force is equal to the weight of the object.This supporting force acts perpendicular to and away from the surface. When an object rests on a surface, the surface applies a force to the object that supports the weight of the object.Tension in a cable supporting an object of mass m at rest, scalar form ![]() ![]() Normal force on an object resting on an inclined plane, scalar form Normal force on an object resting on a horizontal surface, scalar form Normal force on an object resting on a horizontal surface, vector form Newton’s laws of motion, three statements describing the relations between the forces acting on a body and the motion of the body, first formulated by English physicist and mathematician Isaac Newton, which are the foundation of classical mechanics. ![]()
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