A student pushes two blocks across a desk, accelerating both blocks. The mass of block A is larger than the mass of block B $.$ Friction exists on all surfaces.

Rank the magnitude of the horizontal forces on blocks A and $B.$

$$

$F_{\text{p}\text{a}\text{p}}>F_{\text{f}\text{a}\text{b}}>F_{\text{f}\text{o}\text{a}}>F_{\text{f}\text{b}\text{d}\text{e}\text{s}\text{k}}$

$F_{\text{p}\text{a}\text{p}}>F_{\text{f}\text{a}\text{b}}=F_{\text{f}\text{o}\text{a}\text{b}}>F_{\text{f}\text{b}\text{d}\text{e}\text{s}\text{k}}$

Need information about the coefficients of friction.

$F_{\text{p}\text{a}\text{p}}>F_{\text{f}\text{b}\text{d}\text{e}\text{s}\text{k}}>F_{\text{f}\text{a}\text{b}}=F_{\text{f}\text{b}\text{a}}$

$F_{\text{p}\text{a}\text{p}}=F_{\text{f}\text{a}\text{b}}=F_{\text{f}\text{o}\text{a}\text{b}}=F_{\text{f}\text{b}\text{d}\text{e}\text{s}\text{k}}$

$F_{\text{p}\text{a}\text{p}}>F_{\text{f}\text{a}\text{d}\text{e}\text{s}\text{k}}>F_{\text{f}\text{a}\text{b}}>F_{\text{f}\text{b}\text{a}}$