ZEIT1504 Lecture Notes - Lecture 1: Impedance Matching, Compressive Stress, Arctic Fox
25 Jul 2018
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Plane flying 100km/h in still air & wind travels at 30km/h. Wind & plane in same direction, resultant force is 130km/h & when wind & plane in opp directions, resultant force is 70km/h (minus). Gravity all objects falling freely towards earth have same acceleration (ignoring air resistance). v = at v = gt (under gravity). vf= vi + at. Ne(cid:449)to(cid:374)"s (cid:1005)st law object continues rest or constant velocity (in straight line) unless external fore acts on it. Ne(cid:449)to(cid:374)"s (cid:1006)nd law an external force gives object an acceleration which is proportional to the force, i. e. f = ma e. g. Ne(cid:449)to(cid:374)"s (cid:1006)nd law an external force gives object an acceleration which is proportional to the force, i. e. f = ma e. g. double f = double a. 1n is the f needed to accelerate 1kg mass at 1ms-1 (i. e. to cause its velocity to increase by 1ms- F = mg and w = mg both refer to the downwards force (f) being gravity.
