Kinematics & Dynamics Paper 2 mark scheme definitions from 2002-2010 0.0 / 5 ? PhysicsMotionA2/A-levelCIE Created by: Way Leang TanCreated on: 29-12-12 09:43 A Scalar is A quantity with a magnitude only 1 of 10 A Vector is A quantity with both magnitude and direction 2 of 10 Acceleration is change in velocity per unit time 3 of 10 Displacement is distance from a fixed point in a specified direction 4 of 10 The torque of a couple is the product of the magnitude of one of the forces and the perpendicular distance between the two forces 5 of 10 The law of conservation of linear momentum states that the total momentum of a system is constant provided no external forces act on the system 6 of 10 A body is in equilbtrium when the sum of the forces in any direction is zero and the sum of the moments about any point is zero 7 of 10 The center if gravity of an object the point at which the whole weight of the body id considered to act 8 of 10 The moment of a force is the product of the magnitude of the force and the perpendicular distance from the pivot to the line of action of the force 9 of 10 Mass is a measure of 10 of 10
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