biki the body will start 2 decelerate.

though it is moving 2 the right friction is acting towards right

 

it is decelerating due 2 friction

thats y a -ive sign

suppose there is no friction between the bodies ,the lower block will slow down due  to friction due to ground and the upper block will continue to move right.

since there is friction the upper body also starts decelrating

hey ramyani

wen both blocks are given a gentle push towards right,the frictional force on the upper block acts left and not right..

 

 

let f1 be frictioanl force on upper block.it is towards left

-(mg) = ma1 (force is in opp direction)

 

  a1 = - g

 

f1 acts towards right for the lower block of mass 2m

f2 due to ground acts leftwards

 

(mg) - (m+2m)g/2 = 2ma2

 

a2 = (g)/2 - (3g)4 = a2

 

a1 - a2 = - g -- g/2 +3 g/4

 

 =--3 g/2 +3 g/4

= - 3 g/4

3 g/4 in opp direction

 

rate me if im rite

even my math professor told the same thing sir..

i think u shud hav another luk

look bro,

buy o.p Agarwal (iitjee)

 

it has covered all the portions 4 iitjee thoroughly nd has got really gud examples.nd sample problems

its the best investment man....

try arihant organic (optional)its as big as op agarwal

 

tan60=3400/x

x=1963

vel.=x/10

=196.3m/s

 

i think this shud b right

if u interchange the angle u get unbeleivable answers

he ppl ...in ur aieee rank

both ur all india nd state rank r givn

if he is all india 1,he must b state1