GE 226 – Assignment 5
(For all problems, use the methods presented in class)
Problem 1
The square plate has a weight of 30 lb. If the support at B
is suddenly removed, determine the initial reactions at the
pin A.
Partial Final Answers (magnitudes): 11.25 lb, 18.75 lb
Problem 2
The pendulum consists of a uniform 5-kg plate and a 2-kg slender rod. At the instant
 = 30, the angular velocity of the pendulum is 3 rad/s counterclockwise. Determine the
horizontal and vertical reaction forces that the pin O exerts on the rod at this instant.
Partial Final Answers (magnitudes): 54.8 N, 41.2 N
Assignment Continued on Next Page
Problem 3
The smooth 180 lb pipe has a length of 20 ft and a negligible diameter. It is carried on
the truck as shown. If the truck accelerates at a = 5 ft/s2, determine the normal reaction at
A and the horizontal and vertical components of force which the truck exerts on the pipe
at B.
Partial Final Answers (magnitudes): 120 lb, 73.9 lb, 69.7 lb
End of Assignment