Using and Converting Units



Rating - 3/5
508 views

We use equations to express relationships among physical quantities, represented by algebraic symbols. Each algebraic symbol always denotes both a number and a unit. For example, d might represent a distance of 10 m, t a time of 5 s, and v a speed of 2 m>s.
   An equation must always be dimensionally consistent. You can’t add apples and automobiles; two terms may be added or equated only if they have the same units. For example, if a body moving with constant speed v travels a distance d in a time t, these quantities are related by the equation

d = vt

If d is measured in meters, then the product vt must also be expressed in meters. Using the above numbers as an example, we may write

10 m = (2 m/s)(5s)

Because the unit s in the denominator of m>s cancels, the product has units of meters, as it must. In calculations, units are treated just like algebraic symbol with respect to multiplication and division.

These Topics Are Also In Your Syllabus
1 Describing oscillation link
2 amplitude, Period, Frequency, and angular Frequency link
You May Find Something Very Interesting Here. link
3 Simple Harmonic motion link
4 circular motion and the equations of SHM link
5 Types Of Systems link

 

 


Rating - 3/5
503 views

Advertisements
Rating - 3/5