Question

. A force
F
=(
2i
+
3J - 2K
) act at the point(
3i - J - 2
K
). Find the moment of the force
about the point (
4i - 5J
+
2K
).

Answer 1

Answer:  - 10j-15k

Step-by-step explanation:

Moment  of force = Force * perpendicular distance from the point of interest.

given - F = 2i+3j-2k act at point 3i-j-2k

and has to find the moment at point 4i-5j+2k

distance between two points = (4i-5j+2k) - (3i-j-2k) = i-6j+4k

moment of force (M) = F x d (cross product) = (2i+3j-2k) x (i-6j+4k)

M = -10j-15k

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