Solution.
"m=0.9kg;"
"\\alpha=30^o;"
"T_f=\\dfrac{mg}{cos\\alpha};"
"T_f=\\dfrac{0.9\\sdot9.8}{0.87}=10.14N;"
"T_s=mgtan\\alpha" ;
"T_s=0.9\\sdot9.8\\sdot0.59=5.2N;"
Answer: "T_f=10.1N; T_s=5.2N."
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