G484 Definitions 3.0 / 5 based on 1 rating ? PhysicsA2/A-levelOCR Created by: huyzieCreated on: 19-06-13 20:24 Linear Momentum Product of its mass and its velocity (p = mv) 1 of 20 Closed System No external forces; momentum is conserved 2 of 20 Principle of Conservation of Momentum When bodies interact, their total momentum is constant (no external forces) 3 of 20 Newton's First Law Object continues in state of rest/uniform motion unless acted on by a net force 4 of 20 Newton's Second Law When net force acts on object, rate of change of momentum = force producing it, in direction of that force 5 of 20 Newton's Third Law When two objects interact, forces they exert on each other are equal in magnitude but act opposite directions 6 of 20 Impulse Change in momentum (force x time) 7 of 20 Kepler's Third Law The square of period T is proportional to the cube of the radius of orbit 8 of 20 Geostationary Orbit Time period of 24h, orbit above the equator and move in same direction as rotation of Earth 9 of 20 Displacement Distance of mass from its equilibrium position 10 of 20 Amplitude Greatest value of displacement 11 of 20 Period Time for one complete oscillation 12 of 20 Frequency Number of oscillations per second 13 of 20 Simple Harmonic Motion (SHM) When the acceleration of a mass is directed towards a fixed point and is proportional to its displacement from that point 14 of 20 Light Damping Amplitude decreases gradually as mass oscillates 15 of 20 Critical Damping Damping heavy enough for displacement to decreases to zero without oscillation 16 of 20 Internal Energy Sum of random distribution of KE and PE of the system 17 of 20 Melting PE increases; KE decreases 18 of 20 Boiling PE increases; KE is consant 19 of 20 Evaporation More energetic molecules escape; mean KE of molecules in liquid decreases. Temperature drops 20 of 20
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