forcediagrams

forcediagrams - If you ask yourself these questions each...

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A. Forces 1. Weight (force due to gravity – always points directly downwards) 2. Tension (force due to a string – always points away from object) 3. Normal (force on the object due to a surface – always points from the surface towards the object) 4. Friction (always points opposite the direction of motion or potential motion) 5. Push/Pull B. Draw Forces: Ask the following questions each time: 1. Is their gravity? (always yes unless otherwise stated) 2. Are there any ropes/strings attached? 3. Is it on a surface? 4. Is there friction? 5. Is anyone/anything pushing or pulling on the object?
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Unformatted text preview: If you ask yourself these questions each time, you will not forget a force. C. Decide what orientation your x- y- axis should be. Example: Or (ramp) D. COMPONENTS Break any force that is not along an axis into components along the axis E. REDRAW picture All forces drawn are either along the x- or y-axis Example: A sled (mass = m) is pulled up a hill (coefficient of friction = 0.2) with a force of F. " F x = ma x Fcos α – mgsin θ – f = ma x " F y = ma y Fsin α + N –mgcos θ = 0 θ α α θ mgcos θ mgsin θ N Fsin α Fcos α f F...
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forcediagrams - If you ask yourself these questions each...

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