Question

A dynamometer $D$ is attached to two blocks of masses $6kg$ and $4kg$ as shown in the figure. The reading of the dynamometer is

• A. 18 N
• B. 28 N
• C. 38 N
• D. 48 N

Answer 1

Answer: (C)

The tension in the spring will be the reading of dynamometer
$F{)}_{\text{ext }}=Ma$
$50-30=10(a)$
$a=2m/s^2$
for $6kg$ block
$50-T=6(2)$
$T=38N$