Definitions - Mechanics
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| Vector | show 🗑
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| show | A quantity which has magnitude only.
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| show | A measure of the separation between two points.
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| show | The separation between two points in a given direction.
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| Speed | show 🗑
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| Velocity | show 🗑
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| show | The rate of change of velocity.
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| show | v = u + at, s = ut +1/2at², v² = u² + 2as
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| show | The product of the mass and velocity of a body p = mv
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| The principle of the conservation of momentum | show 🗑
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| show | That which changes or tends to change the velocity of an object
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| Newton | show 🗑
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| Weight | show 🗑
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| show | The force that opposes motion between two surfaces in contact
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| show | A body remains at rest or in uniform motion unless acted upon by a resultant force.
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| show | The rate of change of an objects momentum is directly proportional to the force that caused it, and takes place in the direction of that force. F = ma
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| Newtons 3rd Law of motion | show 🗑
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| Work | show 🗑
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| Energy | show 🗑
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| Potential energy | show 🗑
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| show | The energy a body has due to it's motion K.E = 1/2mv²
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| 1 Joule | show 🗑
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| show | Energy can neither be created or destroyed , only converted from one form to another
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| show | The rate at which work is done or energy is converted P = W/t
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| 1 Watt | show 🗑
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| show | an energy source that will not be exhausted e.g, wind , tidal , solar
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| The efficiency of a machine | show 🗑
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| Lever | show 🗑
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| show | The point at which the weight of the object appears to act
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| The moment of a force (Torque) | show 🗑
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| Conditions for equilibrium | show 🗑
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| show | Two parallel forces that act in opposite directions. The moment of a couple is the magnitude of one force multiplied by the perpendicular distance between them
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| show | The extension of an elastic body is directly proportional to the force extending it
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| show | Motion where an objects acceleration is directly proprtional to it's displacement from a mean position and is always directed towards it
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| show | The force between two bodies is directly proportional to the product of their masses. And inversely proportional to the square of the distance between them
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| Centripetal Force | show 🗑
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| Angular Velocity | show 🗑
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| Periodic time | show 🗑
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| Kepler's 3rd Law | show 🗑
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| show | The mass per unit volume of a substance p = m/v
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| show | The force per unit area P = F/A
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| show | When a body is partially or fully immersed in a fluid, it experiences an upthrust which is equal to the weight of the liquid displaced
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| show | A floating body displaces it's own weight of fluid
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| show | For a fixed mass of gas at constant temperature, its volume is inversely proportional to it's pressure
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Created by:
neilkelly
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