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11 Cards in this Set
- Front
- Back
Dynamics
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The study of the causes of motion
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Newton
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units (N)
The Si Unit of force is (1N=1kg*m/s^2) |
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System Diagram
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A simple sketch of all the objects involved in a situation
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Force
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a push or a pull
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Free-body diagram
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(FBD): a simple drawing of an object showing all the forces that are acting on it
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Applied force (Fa)
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a force that results when one object makes contact with another and pushes or pulls on it (contact force)
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Tension (Ft)
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a pulling force from a rope or string on an object that always points toward the rope or string
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Normal force
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a perpendicular force exerted by surface on an object in contact with the surface; the normal force always points away from the surface (contact force)
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Friction (FT)
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opposes the sliding of two surgaces across one another; friction acts opposite to the motion or attempted motion
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Force of gravity (Fa)
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force of attraction between any two objects (Fg*mg)
g=a(9.8m/s^2) |
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Name the four fundamental forces and their respective relative strength, range and effect
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1) gravitational - 1 - infinite - attract only
2) electromagnetic - 10^20 - infinite - attract and repel 3) strong nuclear- 10^38 - less than 10^-15 m - attract and repel 4) weak nuclear 10^25 - less than 10^-18 m -attract and repel |