Ministry of Higher Education & Scientific
Research
University of Technology
Materials Engineering Department
Examiner: Assist. Prof. Dr. Emad S. Al-Hassani
Subject: Engineering Mechanics
Class: First
Date : - - 2012
Time: 3 hr.
(2011-2012)
Note: Answer five questions
All question carry equal marks
Q1: The rectangular plate is made up of 1-ft squares as shown in figure (1). A 75-Ib force is
applied at point A in the direction shown. Determine the moment of this force about point
B and about point C.
Q2: Determine the resultant R of the three tension forces acting on the eye bolt. Find the
magnitude of R and the angle θx which R makes with the positive x- axis. See figure (2)
Q3: The 450-kg uniform I-beam supports the load shown in figure (3). Determine the reactions
at the supports.
Q4: Three workers are carrying a 4-ft by 8- ft panel in the horizontal position shown in figure
(4). If the homogeneous panel weighs 100Ib estimate the lifting force exerted by each
worker
Q5: Determine the x- and y- coordinates of the centroid of the shaded area in figure (5).
Q6: The velocity of a particle traveling in a straight line is given by v= (6t -3t2) m/s, where t is
in second. If s=0 when t=0, determine the particle 's deceleration and position when t= 3 s.
how far has the particle traveled during the 3-s time interval, and what is its average
speed?
Figure (1)
Figure (2)
Figure (3)
Figure (4)
Figure (5)
GOOD LUCK
1. The rectangular plate is made up of 1-ft squares as shown. A 75-Ib force is
applied at point A in the direction shown. Determine the moment of this force
about point B and about point C.
2. Determine the resultant R of the three tension forces acting on the eye bolt. Find
the magnitude of R and the angle θx which R makes with the positive x- axis
3. The 450-kg uniform I-beam supports the load shown. Determine the reactions at
the supports.
4. Three workers are carrying a 4-ft by 8- ft panel in the horizontal position shown.
If the homogeneous panel weighs 100Ib estimate the lifting force exerted by each
worker.
5. Determine the x- and y- coordinates of the centroid of the shaded area.
6.
The velocity of a particle traveling in a straight line is given by v= (6t -3t2) m/s,
where t is in second. If s=0 when t=0, determine the particle 's deceleration and
position when t= 3 s. how far has the particle traveled during the 3-s time
interval, and what is its average speed?