force - push or pull that causes an object to move, stop, or change direction, In physics - a force is anything that makes an object accelerate, If an object is stationary, - it won’t start moving without a force., Forces come in - pairs, Forces have - a magnitude and a direction, SI unit for force is - the Newton, We use a spring scale - to measure force., Net Force - The overall force acting on an object after all forces are combined., Forces in the same direction - we add them., Forces in opposite directions - you subtract them., Balanced Forces: - The forces in each direction are “equal” and do not cause a change in motion, Unbalanced Forces: - If the multiple forces acting at one time are not balanced out (equal), then acceleration can/will occur on the object - change in motion, When unbalanced forces act in opposite directions - you can find the net force, An unbalanced force always causes - a change in motion, Magnitude - The difference between the two forces, Direction - Direction of the largest force, Multiple forces - can combine to move an object that has too much inertia for one force alone., If forces are not equal and are acting in opposite directions, - a negative acceleration can/will occur.,
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Forces: Balanced and Unbalanced (week 1, lesson 2)
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