IIT JEE , AIEEE Forum - Physics , Mechanics

deedee

motion in 1D

important formulaes 4 avg velocity :

if a body covers first half distance wid velocity v1

and d next ahlf veloity v2

then d avg velocity

= (2*v1*v2)/v1+v2

if d body travels wid uniform vel v1............for time t1

n wid uniform vel v2 for tym t2

then avg velocity is

=(v1*t1 + v2*t2)/t1 + t2

if a body covers first half of d distance at d speed v1

next half at d speed v2

n d last one third at d speed v3

then avg speed is

=(3* v1*v2*v3)/v1*v2 +v2*v3 +v1*v3

hope u'll find it useful..... :)