To find: the total force exerted on the pin at position A .
Answer to Problem 5PS
Explanation of Solution
Given information: A precast concrete wall is temporarily kept in its vertical position by
ropes the coordinates of A( 0,0,0), B (8,-10,6) and C (-10,-10,6) respectively. The tensions in AB and AC are 420 pounds and 650 pounds ,respectively .
Calculation:
Locate the origin at point A disregarding the left half of the precast.
Let
Because point A is at(0,0,0), so use this as initial point to find the direction of the forces as follows:
Point B is (8,-10,6) so:
The corresponding unit
Point C is (-10,-10,6)
The corresponding unit is :
The corresponding unit vector for the pin is:
Along x -axis (i-components),
Along y -axis (j-components),
Along z -axis (k-components),
Therefore,
Chapter 11 Solutions
EBK PRECALCULUS W/LIMITS
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