Las Fisica

1)

∑▒〖F_x=0〗

∑▒〖F_y=0〗

F_1=0,49 N F_2=0,683 N F_3=0,971 N

∑▒〖F_x=F_2×cos⁡〖60°〗-F_1×sin⁡〖50°〗=0〗

= 0,342 – 0,315

= 0,027N≈0

∑▒〖F_y=〗 F_1×sin⁡〖50°+×sin⁡〖60°-F_3=0〗 〗

= 0,375 + 0,591 – 0,971

= -0,05 N ≈0

2)

∑▒〖τ_o=0〗

F_1=0,197NF_2=0,243N

〖 r〗_1=0,295m r_2=0,239m

∑▒〖τ_o=(〗 r_2-r_o)×F_2-〖(r_1-r_o)×F〗_1=0

= 0,0581 – 0,0580

= 0,0001Nm≈0

3)

∑▒〖F_x=0〗

∑▒〖F_y=0〗

F_1=1,76N F_2=0,76N F_3=0,197N

∑▒F_x =R_x=0

〖 R〗_x=0

∑▒〖F_y=F_1-R_y-F_2-F_3=0〗

=R_y=-0,803N

∑▒〖τ_0=0〗

r_1=0,178m r_2=0,225m r_3=0,400m

∑▒〖τ_o=〗 (r_1-r_o )×F_1-(r_2-r_o )×F_2-(r_3-r_o)×F_3=0

=0,313 – 0,171-0,141

=0,001Nm≈0

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