units of measurement Essay examples

4676 Words Sep 17th, 2013 19 Pages
PHY 1103

Physics I


Learning Outcome 1:
Sub-outcome 1: Assign given basic units to their corresponding physical quantities.
All engineers must use the same language in their communications, and one of these universal communication tools is the units of measurements.
Physical quantities such as length, weight, time, speed, force, and mass are measured with standard units.
Therefore the magnitude if a physical quantity is given by a number and standard unit of measurement. Examples: 5 meters, 60 kilograms.
SI units are the international system of units (system international). The SI Base Units for the seven fundamental Quantities: Note that the above units are stated in MKS (meter-kilogram-second), another
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What is the total distance did they run?

Summary: Distance is different from Displacement. Distance: is Scalar quantity. Displacement: is Vector quantity. Distance is how much ground an object has covered during its motion.
Displacement is the overall change in object position.

3-Speed and Velocity:
Just as distance and displacement have distinctly different meanings , so do speed and velocity. Speed is a scalar quantity that refers to "how fast an object is moving." Speed can be thought of as the rate at which an object covers distance.
A fast-moving object has a high speed and covers a relatively large distance in a short amount of time. Velocity is a vector quantity that refers to "the rate at which an object changes its position."

Example: During a typical trip to RKMC, your car will undergo a series of changes in its speed. If you were to inspect the speedometer readings at regular intervals, you would notice that it changes often.
The speedometer of a car reveals information about the instantaneous speed of your car. It shows your speed at a particular instant in time. 4-Acceleration and earth gravity:
Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity.
An object is accelerating if it is changing its velocity.
An object moving

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