07:13
Physics for Scientists and Engineers with Modern Physics
(II) In Fig. 35 the coefficient of static friction between mass
$m_{\mathrm{A}}$ and the table is $0.40,$ whereas the coefficient of kinetic
friction is 0.30$(a)$ What
minimum value of $m_{A}$
will keep the system
from starting to move?
(b) What value(s) of $m_{A}$
will keep the system
moving at constant
speed?