Answer:
[tex]the \: strongman \: pulls \: with \: a \: met \: force \: of \: 909.2N[/tex]
Explanation:
[tex]If \: there \: is \: 746N \: of \: friction \: between \: the \: tire \: and \: the \: ground, \: \\then \: the \: strong \: man \: pulls \: with \: : \\ f = ma = 136 \times 1.2 =163.2 + 746 = 909.2N[/tex]