Question

Pulleys are ideal and string are massless. The masses of
blocks are mı = 4 kg and m2 = 1 kg as shown. If all
surfaces are smooth then the acceleration of m2 is (g = 10
m/s)​

Answer 1

We have,

m1=4kg,m2=2kg,m3=1kg

So,

4g=40N and 2g+4g=6g=60N

So,

anet(↓)=nf

=1060−40=1020

=2m/s2

Thus, The acceleration of blocks will be 

=2m/s2