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Q.
$T_{1}$ and $T_{2}$ in the given figure are
Laws of Motion
Solution:
Acceleration of the system
$a=\frac{F_{\text {ext }}}{M_{\text {Total }}}=\frac{120}{3+5+7}= 8\,m/s^2$
Writing equation for $7\, kg$ mass
$T_{2} =7(8)$
$=56\, N$
Writing equation for $5\, kg$ mass
$T_{1} =T_{2}+5(a)$
$=56+5(8)=96\, N$
