Jun 17th, 2015
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By one dimension we mean that the body is moving only in one plane and in a straight line. Like if we roll a marble on a flat table, and if we roll it in a straight line (not easy!), then it would be undergoing one-dimensional motion.

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Physics - the study of matter and energy.Base quantity - cannot be defined in terms of other physical quantities.Derived quantity - can be derived by the combination of 2 or more base quantities either by multiplication , division or both.Standard form - A (1-10) x 10Scalar Quantity - A quantity that has magnitude only. (Distance , speed , mass)Vector Quantity - A quantity that has both magnitude and direction. (displacement , weight , acceleration)Systematic error - either more/less than the actual value. (zero error)Random error - either lower/more than the actual value. (parallex error)Consistency/Precision - the ability to register the same reading when a measurement is repeated.Accuracy - the degree to which a measurement represent the actual value.Sensitivity - the ability of a measuring instrument to detect a small change in the quantity being measured.Speed - the rate of change of distance.Velocity - the rate of change of displacement.Acceleration - the rate of change of velocity.Acceleration = 0 : constant velocity or at rest. ( no change in velocity)Constant acceleration - Increasing velocity (+ve)Constant deceleration - Decreasing velocity (-ve) One dot space/ One tick - the time interval between one carbon dot and the next one on the ticker tape.Inertia - the property of an object to continue in its state of rest or in a uniform speed in a straight line unless acted upon by an external force (resist changes)Newton's Law of inertia - st

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