Define Average Speed in Various Cases

(a) Particles covering different distances in different times say a particle covers s1 distance in time t1 ,s2 in time t2, s3 in time t3 and so on then average speed is

v = s1 + s2 + s3+……. /t1 + t2+ t3……. = s1 + s2+ s3+……/s1/v1 + s2/v2 + s3/v3+……

Special case

If s1 = s2 = s

v = 2s/s (1/v1 + 1/v2) = 2v1 v2/v1 + v2 (harmonic mean)

(b) Bodies moving with different speeds in different intervals of time a body moves with velocity v1 on time t1, v2 in time t2, v3 in time t3 and so on then

v = v1 t1 + v2 t2 + v3 t3 +….. /t1 + t2 + t3 +…..

Special case

if t1 = t2 = t3…..t (say) then

v = v1 + v2 + v3+….vn (arithmetic mean)

Units of speed or velocity me-1 in SI, cms-1 in CGS and fts-1 on FPS. Dimensional formula (LT-11)

Acceleration the time rate of change of velocity is called acceleration.

A = dv/dt

(a) Uniform acceleration a body is said to moves with uniform acceleration if acceleration remains constant throughout the motion and direction of motion does no change with time, that is,

(i) A = dv/dt = constant

(ii) Direction of motion remains unchanged.

(b) Variable or non-uniform acceleration if the acceleration is not constant or if the acceleration is constant but direction of motion varies or both vary. The particle is said to posses variable acceleration

Unit of acceleration ms-2 in SI system, cms-2 in Cos system fts-2 FPS system

Dimensional formula of acceleration [LT-2]

Posted Date: 1/31/2012 11:14:08 PM | Location : United States

Ask an Expert

Related Discussions:- Average Speed in Various Cases, Physics, Assignment Help, Ask Question on Average Speed in Various Cases, Physics, Get Answer, Expert's Help, Average Speed in Various Cases, Physics Discussions

Write discussion on Average Speed in Various Cases, Physics
Your posts are moderated

Write your message here..

Related Questions

Card custodian, Card custodian An person who is assigned responsibility of... Card custodian An person who is assigned responsibility of purchase card security & issuance of cards to authorized users,

Qualitative survey and data analysis, Data Analysis: A qualitative surve... Data Analysis: A qualitative survey was conducted in order to understand the impact of international accounting standards. To start with, a secondary research was done to unders

Measure of dispersion, What are the applications of measure of dispersion i... What are the applications of measure of dispersion in civil engineering?

Reply plz, order tomatoes in crates of 25 kg and he is able to stock a maxi... order tomatoes in crates of 25 kg and he is able to stock a maximum of four crates or 100 kg of tomatoes. His experience taught him that the daily demand ranges from 0 to100 kg of

SAS, do this do this

Psuedocode, If today is a weekday and it’s not a holiday, then you go to wo... If today is a weekday and it’s not a holiday, then you go to work. However, if it’s a weekday and a holiday, then what you do depends on the weather: If it’s raining, you play vide

Statistics study, Find a statistics study (from a newspaper article, journa... Find a statistics study (from a newspaper article, journal, research study, or online article) and describe the five-step process of the study. (Hint: it may help to identify the f

Ch 7 , .A study of long term phone calls made from general electricss corpo... .A study of long term phone calls made from general electricss corporate headquarters in fairfeild, conneticuit, revealed the length of the calls, in minutes follows the normal pro

Determine the price rate-demand , SkyyMarley Airlines has determined that t... SkyyMarley Airlines has determined that the price elasticity of demand for two customer segments (Coach and Business Class) is -1.35 and -2.50.  Based on their expectations of prof

Standard error of the differnce between means., IN two separate studies, th... IN two separate studies, the actual difference between the means of a treated group and untreated group is 3 points. However, in one study sm1-m2 is very large and so the 3 points