Chapter 1 Models, measurements, and vectors

1.1 Introduction
Physics is an experimental science. Physicists observe the phenomena of nature and try to find patterns and principles that relate these phenomena.These patterns are called physical theories or, when they are very board and well established, physical laws.The development of physical theory requires creativity at every stage. The physicist has to learn to ask appropriate questions, design experiments to try to answer the questions, and draw appropriate conclusions from the results.

brought to you by : Physics University Eighth Edition ,Hugh D. Young


Physics is the study of the physical Universe. And though we all know what the words physical Universe refer to, it would take volumes to attempt to explain what they mean. The problem is that the basic underlying concepts-matter, space, and time- are difficult if not impossible to define conceptually, a shortcoming we share with the philosophers.

Energy

force is the agent of change, energy is a measure of chang.
chemmical energy can be gotten from biodiesel or oil.

Energy describes the state of a system in relation to the action of four force.Energy is transferred from one configuration of interactions to another, such that the total amount of energy remains unchanged.

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