Force Diagrams.

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Presentation transcript:

Force Diagrams

Different types Type of Force Exampels Push Pull (Tension) Gravity Surface (Normal) Friction Air Resistance Weight

Representing Forces When drawing forces, we use VECTORS. Arrows point in the direction of the force. Length = strength *Longer arrow = stronger force

Balanced vs. Unbalanced. Balanced – No acceleration Balanced vs. Unbalanced Balanced – No acceleration Unbalanced – Acceleration to the bigger Force

Net Force = Total Force. Same direction = add Net Force = Total Force Same direction = add Opposite direction = subtract 5 N 10 N 20 N 10 N 10 N 10 N

Drawing Force Diagrams Drawing that shows direction and strength of ALL forces acting on the object Length = strength Label arrows (with units) Arrow starts at the object (Do not stab your drawing)

Bad Diagram 50 N 20 N

Extra tips Fg is always straight down Fn is perpendicular to the surface (walls don’t usually push up) Ff is always opposite of motion!