Question

$T_1$ and $T_2$ in the given figure are

• A. 28 N , 48 N
• B. 48 N , 28 N
• C. 96 N , 56 N
• D. 56 N , 96 N

Answer 1

Answer: (C)

Acceleration of the system
$a=\frac{F_{\text{ext }}}{M_{\text{Total }}}=\frac{120}{3+5+7}=8m/s^2$
Writing equation for $7kg$ mass
$T_2=7(8)$
$=56N$
Writing equation for $5kg$ mass
$T_1=T_2+5(a)$
$=56+5(8)=96N$