Question

3. A prismatic timber of weight 100N and
length 70cm is supported horizontally
between two fixed fulcrums A and B, as
shown in the figure below. If the coefficient
of friction between t'e timber and each
fulcrum is 1/3, the magnitude of a horizontal
force P applied as shown that will cause
impending sliding of the timber to the right
is:
Locm 20cm
B
P
12cm
L
Ο.
35cm
A
W = 100N
(a) 40N (b) 50N (c) 80N
(d) 100N​

Answer 1

Answer:

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