Chapter 4 Test Review .k12.ca.us
forceforcecontact forces occur from direct physical contact, field forces can act at a distance with no contactcontact force: lifting a box, pushing a car , field force: gravity, magnetismNewtondifferent arrow lengthsforces acting on an objectdowntendency of an object to maintain its state of motionit is constant (can be zero)velocity is changing (acceleration)acceleration is directly proportional to net forceacceleration is inversely proportional to masssimultaneous equal but opposite forces resulting from the interaction of two objects, example: the force of a book on a table and the force of the table on the book2, 2gravitational forcemassgravitational force is different on different planets (so is acceleration due to gravity)free body diagraman object at rest remains at rest and an object in motion remains in motion with constant velocity unless acted upon by an non-zero net forceΣF = ma, net force (or vector sum of forces) = mass x accelerationThe larger mass would have a smaller acceleration, and the smaller mass would have a larger accelerationup7 N, to the right2.5m/s26750 NFnet = 500N – 300N = 200Na=F/m = 200N/200kg = 1 m/s2The scale reading will increase momentarily then will decrease as you are moving upward from the scale. 15525739412115522131204150, 212116333-625920504532794120436132794120436134162120367735812036773553011914013-62591825453-1525918117735811743373-69791641133-62591368253-305719726733170681713053745611224973132221104065313222197081312538193157311854182897390821754093139061760933904611427293227811900333184611907173-72619120445322611456813-110591398133-10339140929369411170253-171191109053386811108333-160391061173-160392221093592012262133113212207413318412139373181612084653181611982413-23591989253250011393453-3140591579573127061158533362261213253374561213253333521205045367721202345347201197557333521189349347201183229388241182545333521173653313001163429320201Fnet = 25N – 15N = 10Na=F/m = 10N/75kg = 0.13 m/s2 ................
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