Physics true or false reviewer.pdf

Physics -Physics begin with measurement -is simply a comparison with a standard Measurement -Types: Metric & English -Physical Quantity - A quantifiable or assignable property -Ascribed to a particular phenomenon, body or substance Derived Unit- A derived unit is a unit that results from a mathemati...

Physics -Physics begin with measurement -is simply a comparison with a standard Measurement -Types: Metric & English -Physical Quantity - A quantifiable or assignable property -Ascribed to a particular phenomenon, body or substance Derived Unit- A derived unit is a unit that results from a mathematical combination of SI base units. We have already discussed volume and energy as two examples of derived units. Ex. Acceleration Fundamental quantities- A base quantity is one of a conventionally chosen subset of physical quantities, where no quantity in the subset can be expressed in terms of the others. -Mantissa x 10n Types of error -Systematic-Instrument -Random-Unusual Scalar- Quantity described by magnitude only Vector-Quantity described by direction, magnitude, unit Determining vector direction Quadrant Signs Directions 1 +,+ North of East 2 +,- North of West 3 -,- South of West 4 -,+ South of East Vector Addition- sum of two or more vectors is called the resultant -may be added graphically or analytically Graphical Method -Head to Tail Method -Tail to Tail Method Analytical Method -Adding two vectors in the same or opposite directions -Same Direction- Arithmetic sum -Opposite Directions-Arithmetic Difference -Bigger magnitude -Adding Vectors at Right Angle to each other -Pythagorean Theorem= c^2=a^2+b^2 -Tan^-1 fr^1/fr^2 -Adding Two Vectors using cos and sine Law -cos=c2=a2+b2-2ab cos c -Sine=a/sinA=b/SinB=c/SinC Adding Two or More Vectors using component method Formula Vx=V cos 0 Vy=V sin 0 Component method steps 1. Resolve the given vectors into its horizontal and vertical components 2. Get sum of x and y components 3. Use Pythagorean Theorem-R^2=Rx^2+Ry^2 4. Use the signs of Rx and Ry to determine the quadrant 5. Find the reference angle