$Q$

$V_{cosx}=?$

trace till whicb it is evo motion,

$F_{um}=0\mathrm{.}5109\mathrm{.}8$

$=49N$

$\{\begin{array}{c}\text{:}\frac{10p-}{\frac{100}{49}}=\frac{4}{t}\text{:}\end{array}$

$t=\frac{43}{25}s$

${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}(T-F)dt=m(v_1-v_1)$

$t=5\mathrm{.}25$Avs