Question

An object travels half of the dispalcement with velocity v1=20km/hr and next half dispalcement with v2=30km/hr.Find average speed and velocity.​

Answer 1

Answer:

your answer is here buddy

Explanation:

Displacement = V-U

= 30-20

= 10 km

{ final velocity =30and intial velocity=20}

Since, the half of displacement = 10/2=5km

first we find the time ,t =

condition 1. = when 5km at 20km/ hr

= T=D/S

= T=5/20

= T=1/4 hours

condition 2. = when 5km at 30km/hr

= T=D/S

= T= 5/30

= T= 1/6 hours

total time taken = 1/4+1/6

= 3+2/12

=5/12 hours

average speed = total distance/ total time

= 5+5 / 5/12

= 10/ 5/12

= 12×10/5

= 120/5

= 24km/hr

average velocity = displacement/ Time taken

= 10/ 5/12

= 10×12/5

=120/5

=24km/hr

I HOPE IT'S HELP YOU

hey buddy , you may be thinking that displacement and distance are never the same, this is wrong so let me say that there are certain conditions where these two becomes same.