Answer
(a) $12.8N$
(b) $12.7N$
Work Step by Step
(a) We know that
$F_s=(m_b+m_s)(g)+\frac{\Delta m}{\Delta t}(v)$
We plug in the known values to obtain:
$F_s=(0.540+0.750)(9.81)+(0.0560)(3.20)$
$F_s=12.8N$
(b) As $W=(m_b+m_s)(g)$
We plug in the known values to obtain:
$W=(0.540+0.750)(9.81)$
$W=12.7N$
