Vxf vxi a most oken we deal with constant acceleraon

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: on of par#cle with constant accelera#on There is a very common example of constant accelera#on: the accelera#on of free fall, i.e., the accelera#on due to gravity: the famous g = 9.8 ms ­2. It is interes#ng that all bodies, irrespec#ve of their shapes and masses have this free fall accelera#on, in absence of air resistance. vxf − vxi a= Most oKen we deal with constant accelera#on: x Δt This expression gives one of the kinema#c equa#on we use very frequently: vxf = vxi + ax Δt If we start from t = 0, Δt = t – 0 = t and this becomes v −v vxf =axxi= afx t xi v +x Δt Note that this equa#on follows just from the defini#on of (constant) accelera#on Equa#on (1) Mo#on of par#cle with constant accelera#on (contd…) Since we are dealing with constant accelera#on, the average velocity can be wriXen as vxi + vxf vx , avg = 2 x f − xi We already know that average velocity is given by: vx , avg = Δt x f − xi For our case of star#ng...
View Full Document

This note was uploaded on 11/16/2010 for the course PHY 2170 taught by Professor Blank during the Spring '08 term at Wayne State University.

Ask a homework question - tutors are online