If FA = 1.3 kN i - 4.3 kN j and FB = - 1.8 kN i - 1.8 kN j, what is the magnitude of F = 6FA + 8FB ? KN
+130099 If FA = 1.3 kN i - 4.3 kN j and FB = - 1.8 kN i - 1.8 kN j, what is the magnitude of F = 6FA + 8FB ?
6 < 1.3 kN i , -4.3 kN j > + 8 < -1.8 kN i , - 1.8kN j > =
< 7.8 kN i , -25.8 kN j > + < 14.4 kN i - 14.4kN j > =
< ( 7.8 + 14.4) kN i , ( -25.8 - 14.4) kN j > =
< 22.2 kN i , -40.2 kN j >
