EGR 280 – Mechanics Problem Set 1 - Oakland University
EGR 280 – Mechanics Problem Set 2
Graphics and problem statements © 2004 R.C. Hibbeler.
Published by Pearson Education, Inc., Upper Saddle River, NJ.
|[pic] |2.1 Determine the angle θ between the tails of the two |
| |vectors. |
| | |
| |Ans: θ = 121° |
|[pic] |2.2 Determine the angle θ between the y axis of the pole and|
| |the wire AB. |
| | |
| | |
| |Ans: θ = 70.5° |
|[pic] |2.3 Determine the magnitude and directional sense of the |
| |resultant moment of the forces about point P. |
| | |
| |Ans: MP = 3.15 kN-m ccw |
|[pic] |2.4 Determine the magnitude and directional sense of the |
| |moment of the force at A about point P. |
| | |
| |Ans: MP = 3.15 kN-m ccw |
|[pic] |2.5 Determine the moment of the force at A about point O. |
| |Express the result as a Cartesian vector. |
| | |
| |Ans: MO = (260i + 180j + 510k)N-m |
| |2.6 For the figure of Problem 2.5, determine the moment of |
| |the force at A about point P. Express the result as a |
| |Cartesian vector. |
| | |
| |Ans: MP = (440i + 220j + 990k)N-m |
|[pic] |2.7 The chain AB exerts a force of 20 lb on the door at B. |
| |Determine the magnitude of the moment of this force along |
| |the hinged axis x of the door. |
| | |
| |Ans: Mx = 44.4 ft-lb |
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