 5 moment of forces

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Information about 5 moment of forces
Education

Published on October 20, 2014

Author: felna00

Source: slideshare.net

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Moment of a Force, Definition of Torque, Second Condition of Equilibrium, Solving Problems using First and Second Laws of Motion

1. MOMENT OF A FORCE

2. Objectives  To analyze non- concurrent forces acting on an object.  To verify the second condition of equilibrium.  To analyze forces using 1st and 2nd condition of equilibrium.

3. Moment o f a Fo r c e , M o r T me a s u r e o f t h e a b i l i t y o f a f o r c e t o p r o d u c e r o t a t i o n a b o u t a n a x i s T = f o r c e x mome n t a r m = F d * Mome n t a rm i s t h e p e r p e n d i c u l a r d i s t a n c e o f t h e l i n e o f a c t i o n o f t h e f o r c e f r om t h e a x i s o f r o t a t i o n e x . s e e s a w

4. Un i t o f Mome n t i s Nm (MK S ) d y n e cm ( C G S ) l b f t ( E n g l i s h )

5. F1 F1, F2, and F3 are non-concurrent forces. F2 F3

6. Second Condition of Equilibrium  Equilibrium of Non – concurrent Forces  The sum of all the torques acting on an object is zero. ΣT = 0

7. Exercises 1. A uniform 30-lb beam 10 feet long is carried by two men A and B, one at each of the beam. If A exerts a force of 25 lb, where must a load of 50 lb be placed on the beam? What force does B exert?

8. 2. A weight W1 balances a 5.0 lb weight, W2, on the other side of the fulcrum. Calculate the value of W1 and the force exerted by the fulcrum? 10 in 13 in W2 W1

9. 3. A meter stick is free to rotate about its center. A load of 85 grams is hung at the 100 cm mark. What load should be placed at the 30 cm mark so that the meter stick will remain in a horizontal position?

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