Question

Problem 2
Determine the force P must be applied to the wedges shown in Fig. 2 to start them under the block?
The angle of friction for all contact surfaces is 10°.
W = 1000 lb
P
P
15°
15°​

Answer 1

Answer:

If R is the (3x3) rotation matrix, then the angle of rotation will be acos((tr(R)-1)/2), where tr(R) is the trace of the matrix (i.e. the sum of the diagonal elements).