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Forces - Coggle Diagram
Forces
Moments at work
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Longer spanner, bigger turn. More distance from pivot (longer handle) means greater turning moment.
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Crowbars - leverage moments. Smaller force over longer distance lifts heavy objects using a pivot point.
Increase force or distance for bigger turn. Apply more force or use longer lever for stronger moment.
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Forces between objects
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Forces impact car movement: Balanced forces mean no motion change, unbalanced cause start/stop/direction shift.
Friction: Ground and tires interact with this force, aiding forward motion but also slowing the car.
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Tractor overcomes mud's force: Pulling force from tractor needs to exceed the force exerted by the mud.
Equal and opposite forces stressed: Every force has a counter force of equal strength acting in the opposite direction.
Vectors and Scalars
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Scale diagram
when one or more force acts on an object, it sometimes needs to be shown on a scale diagram. example below
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Key points
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A vector quantity can be represented by an arrow in the direction of the vector and of length in proportion t the magnitude of the vector
Resultant forces
Balanced Forces
Newton's first law of motion says that if the forces of an object are balanced, the resultant force is zero girlfriends. If only two act on a object with zero resultant force, the forces must be equal to each other and act in opposite directions
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Force Diagrams
When an object is cummed on by more than one force, you can draw a free body diagram to find the resultant force on the object
A free-body force diagram shows the forces acting on an object without any other objects or forces shown. Each force is an arrow pointing the direction of the force. example below
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Key Points
The resultant force is a single force that has the same effect as all of the forces acting on an object
If the resultant force on an object is: - Zero, the object stays at rest or at the same speed and direction. - Greater then zero, the speed or direction of the object will change.
If two forces act on an object along the same line, the resultant force is: - their sum, if the forces act in the same direction. - Their difference, if the forces act in opposite directions
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