The force F = {600i + 300j - 660k} N, acts as shown. a) Determine moment about t
ID: 2994259 • Letter: T
Question
The force F = {600i + 300j - 660k} N, acts as shown.
a) Determine moment about this force about point A, using the vector approach.
b) Determine moment about this force about point A, using the scalar approach.
c) Determine moment of this force about point O, using the vector approach.
d) Determine moment of this force about point O, using the scalar approach.
I know the answer to a but I'm confused on the two ways to work out the problem.
Image: http://s24.postimg.org/sax4fl3mt/Screen_Shot_2014_02_19_at_5_02_48_PM.png
The force F = {600i + 300j - 660k} N, acts as shown. Determine moment about this force about point A, using the vector approach. Determine moment about this force about point A, using the scalar approach. Determine moment of this force about point O, using the vector approach. Determine moment of this force about point O, using the scalar approach.Explanation / Answer
Ma=FxR
== {600i + 300j - 660k} X {1.2j}
== {720k+792i}
== sqrt(720^2 + 792^2)
== 1070.35Nm
Mo = FxR
=={600i + 300j - 660k} X {1.2j+0.4k}
== {720k+792i-240j+120i}
== {912i-240j+720k} Nm
== 1186.48 Nm
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