PHYS112 Lecture Notes - Lecture 3: Normal Force, Electromagnetism, Net Force
19 Sep 2014
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Document Summary
Lectures 8, 9 and 10 + chapter 5: newton"s laws of motion. Force: a push or a pull; magnitude and direction. Mass: a measure of the difficulty in accelerating an object. Equivalently, a measure of the quantity of matter in an object. Newton"s first law: if no forces act on an object, it continues in its original state of motion. Objects will keep on doing what they are already doing unless another force is applied. Types of field forces (greatest to least strength) strong nuclear force electromagnetic force: weak nuclear force gravity. Contact forces pushing/pulling forces tension in string: normal force. External force: any force that results from the interaction between the object and its environment. Inertia: the tendency of an object to continue in its original motion (qualitative) Mass: a measure of the resistance of an object to changes in its motion due to a force; scalar,
