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Details Title: Newton and Forces Description: Newton and FORCESSSS Total Flash Cards: 6 Created: 11/16/2006 12:08:29	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term First Law Definition An object at rest will remain at rest OR an object in motion will maintain a constant velocity (and move in a straight line) if there is NO unbalanced force acting on it *This tendency of an object to resist a change in its motion is known as inertia and it is directly related to the mass of the object. Term static equilibrium Definition In the case when the object is at rest, it would be in static equilibrium. The forces acting on the object would sum to zero, and the object’s acceleration would be equal to zero Term dynamic equilibrium Definition If the object were moving at a constant velocity, it would be considered dynamic equilibrium Term Second Law Definition ΣF = ma ΣF= sum of forces m= mass a = acceleration If there is an unbalanced force acting on the object, it will accelerate. The direction of the acceleration will be the same as the direction of the unbalanced (i.e. net) force. Term Third Law Definition Whenever an object exerts a force on a second object, the second object exerts an equal force in the opposite direction on the first object. Forces always come in pairs. Note: these action/reaction pairs NEVER act on the same object. They therefore can never cancel each other out. Term Weight Definition Weight • Also knows as gravitational force. It is NOT mass. • Close to the surface of the Earth or some other planet, Fg = mg (where “g” is the acceleration due to gravity). • ALWAYS is directed straight down.