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If the forces are balanced the body will not accelerate.Ī mass of 50 kg is accelerated with 2 m/s 2. If there is a net unbalance between forces acting on a body the body accelerates. Surface forces at supports or points of contact between bodies are called reactions. Examples - gravitation or electromagnetic fields. "If one object exerts a force F on an other object, then the second object exerts an equal but opposite force F on the first object"Ī body force is when one body exerts a force on an other body without direct physical contact between the bodies.Newton's third law describes the forces acting on objects interacting with each other. A pound is the unbalanced force which will give a 1 slug mass an acceleration of 1 ft/s 2.The unit of force in the Imperial or British system is the pound - lb, lb f. A dyne is the unbalanced force which will give a 1 gram mass an acceleration of 1 cm/s 2.In the centimetre–gram–second system of units (cgs) - a variant of the metric system - the unit of force is called the dyne.
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A Newton is the unbalanced force which will give a 1 kg mass an acceleration of 1 m/s 2.The net effect of two or more forces acting on the same point is the vector sum of the forces. It is common to express forces as vectors with magnitude, direction and point of application. The Newton is defined as the force which, when applied to a mass of one kilogram, gives an acceleration of one meter per second squared. The unit of force is the Newton (N) - where one newton is one kilogram metre per second squared. Force is an abstraction representing the push and pull interaction between objects.