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31 Cards in this Set
- Front
- Back
Newton's 1st Law of Motion |
An object will remain at rest or continue travelling at a constant velocity, unless acted upon by an external force. |
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The change in momentum of an object is directly proportional to the net force acting upon it, and is in the direction of the net force. |
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When object A exerts a force on object B, object B exerts a force that is equal, opposite in direction, and of the same type on object A. |
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The product of the force and the time for which it acts (F∆t). It is equal to the change in momentum of a body (area under a force-time graph). |
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Both kinetic energy and momentum are conserved. |
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Momentum is conserved, kinetic energy is not. Due to the objects deforming, kinetic energy is transferred to other forms of energy, such as thermal. |
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The force that gives a mass of 1kg an acceleration of 1ms^-2. |
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In a closed system, the total momentum before a collision is equal to the total momentum after a collision. |
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The angle subtended at the centre of a circle by an arc length equal to the radius. |
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Change of angle per unit time. |
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Number of oscillations per unit time. |
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Time taken for a complete oscillation. |
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Distance an object has travelled from its rest position. |
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Maximum displacement of a particle from the equilibrium position. |
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Net force acting on an objecting causing it to travel in a circular path, and is always directed towards the centre of the circle. |
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Acceleration towards the centre of a circle keeping the object in elliptical orbit. |
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Force per unit mass. |
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Gravitational force of attraction 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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The square of the orbital period of a planet is directly proportional to the cube of its orbital radius. |
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An artificial satellite with an equatorial orbit, with the orbital period equal to one day. |
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Fraction of an oscillation between the vibrations oscillating particles. |
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An object where its acceleration is proportional to its displacement, in the direction of the equilibrium position. |
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Oscillatory motion where the amplitude is severely reduced due to energy loss. |
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Where driving frequency is equal or close to the vibrating object’s natural frequency, causing a huge increase in its amplitude. |
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Pressure |
Force per unit cross-sectional area. |
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Internal Energy |
Sum of the random distributions of kinetic and potential energies of all the particles in a body. |
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Specific Heat Capacity |
Energy required per unit mass of a substance to raise its temperature by 1K or 1℃. |
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Latent Heat of Fusion |
Quantity of energy per unit mass required to change a substance from a solid into a liquid, at a constant temperature. |
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Latent Heat of Vaporisation |
Quantity of energy per unit mass required to change a substance from a liquid into a vapour, at a constant temperature. |
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Boyle’s Law |
The volume of a fixed mass of gas is inversely proportional to the pressure exerted on it, provided the temperature is kept constant. |
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Charles’ Law |
The volume occupied by a gas at constant temperature is directly proportional to its absolute temperature. |