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Forces

Forces. Types to Know. A PUSH OR PULL between an object and an agent Forces have direction, so are vectors. Force: Definition. Every force has an agent - a cause in the environment. Long-range or Field Forces Contact Forces. Identifying Forces. F g F orce due to gravity F g = m g.

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Forces

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  1. Forces Types to Know

  2. A PUSH OR PULL between an object and an agent • Forces have direction, so are vectors Force: Definition

  3. Every force has an agent - a cause in the environment • Long-range or Field Forces • Contact Forces Identifying Forces

  4. Fg • Force due to gravity • Fg = m g Gravitational Force (Fg)

  5. Fapp • Push or pull applied to an object by a person or another object. Applied Force

  6. FN • Support force exerted upon an object which is in contact with another stable object. • Always perpendicular to the surface. Normal Force

  7. FT • Support force transmitted through a string when it is pulled tight by forces acting from each end. • Directed along the string and pulls equally on the objects on either end of the wire. • No equation. • Solve for it • It cancels • It is given Tension Force

  8. Ff • Force exerted by a surface as object moves across it. • Generally opposes the motion of the object. • Ff = μ FN(μ = coefficient of friction) Friction Force

  9. Fair • Special type of friction force which acts on objects as they travel through air • Opposes the motion of the object. • Usually neglected because very small. • Important for objects traveling at high speeds (sky diver or skier) or those with large surface areas Air Resistance Force

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