EGR 280 – Mechanics Problem Set 1 - Oakland University
EGR 280 – Mechanics Problem Set 5
Graphics and problem statements © 2004 R.C. Hibbeler.
Published by Pearson Education, Inc., Upper Saddle River, NJ.
|[pic] |5.1 In each case, determine the force P required to |
| |maintain equilibrium. The block weighs 100 lb. |
| | |
| |Ans: |
| |P = 25.0 lb |
| |P = 33.3 lb |
| |P = 11.1 lb |
|[pic] |5.2 Determine the horizontal and vertical components of |
| |force at C which member ABC exerts on member CEF. |
| | |
| |Ans: |
| |Cx = 75 lb |
| |Cy = 100 lb |
|[pic] |5.3 The front of the car is to be lifted using a rigid 10-ft|
| |long board. The car weighs 3,500 lb with center of gravity |
| |at G. Determine the position x of the fulcrum so that an |
| |applied force of 100 lb at E will lift the front of the car.|
| | |
| |Ans: x = 9.43 ft |
|[pic] |5.4 The engine hoist is used to support the 200-kg engine. |
| |Determine the force acting in the hydraulic cylinder AB, the|
| |horizontal and vertical components of force at the pin C and|
| |the reactions at the fixed support D. |
| | |
| |Ans: |
| |FAB = 9.23 kN |
| |Cx = 2.17 kN |
| |Cy = 7.01 kN |
| |Dx = 0 |
| |Dy = 1.96 kN |
| |MD = 2.66 kN-m |
|[pic] |5.5 The wall crane supports a load of 700 lb. Determine |
| |the horizontal and vertical components of reaction at the |
| |pins A and D. Also, what is the force in the cable at the |
| |winch W? |
| | |
| |Ans: |
| |T = 350 lb |
| |Ay = 700 lb |
| |Ax = 1.88 kip |
| |Dx = 1.70 kip |
| |Dy = 1.70 kip |
|[pic] |5.6 The compound arrangement of the pan scale is shown. If |
| |the mass on the pan is 4 kg, determine the horizontal and |
| |vertical components of force at pins A, B and C and the |
| |distance x of the 25-g mass to keep the scale in balance. |
| | |
| |Ans: |
| |Ay = 34.0 N, Ax = 0 |
| |Cy = 6.54 N, Cx = 0 |
| |By = 1.06 N, Bx = 0 |
| |x = 292 mm, |
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