Question

In the figure shown mass of all blocks is same and is 4 kg each

Answer 1

Answer:

By applying force balance equation on all the three free masses

The acceleration of all the three masses =a

Let all the three masses are a system of 20 kg moving in one direction

So, the acceleration of all the masses is same is same as combined  mass

a=totalmassnetforce​a=6+4+10100−40​=2060​=3

Apply force balance equation for mass 6 kg,

100−N1​=6×3100−N1​=18N1​=82Nformass4kgN1​−N2​=4×3N1​−N2​=12hereN1​=82Nthen,N2​=82−12=70N

Explanation: