An engineer estimates that under the most adverse expectedweather conditions, th

Question

An engineer estimates that under the most adverse expectedweather conditions, the total force on the highway sign will be F =(+-2.4i - 4.1j) kN, acting at the cm. The position vector of the highway sign is r = (6k +8j). Please show all your work when doing the vector crossproduct!! Thanks for your help. An engineer estimates that under the most adverse expectedweather conditions, the total force on the highway sign will be F =(+-2.4i - 4.1j) kN, acting at the cm. The position vector of the highway sign is r = (6k +8j). Please show all your work when doing the vector crossproduct!! Thanks for your help.

Explanation / Answer

force F = -2.4 i -4.1 j position vector r = 6 k + 8 j r X F = ( 8 j + 6 k ) X ( -2.4 i -4.1 j )          = ( 8 *-2.4 ) ( -k ) + ( 8 * -4.1 ) ( 0 ) + ( 6 * -2.4 ) ( j ) + ( 6 *-4.1 ) i          = 19.2 k -14.4 j -24.6 i

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