Section: Solid Mechanics | Marks: 1
A block of weight W, connected to two springs with spring constants 1k and 2k , rests initially on a horizontal frictional surface. The coefficient of static friction between the block and the surface is μ. Both springs are initially undeformed. The magnitude of force F, applied to the second spring, is now gradually increased. The block will start to slide when F becomes
- A. W μ
- B. 1 1 2 /( ) k W k k μ +
- C. 2 1 2 /( ) k W k k μ +
- D. 2 1 / k W k μ P = 5 kN 4 5 m 5 m 3 B A C B A C 3 kN 3 kN B A C 1.5 kN C 1.5 kN B A C B A 3 kN F k2 k1 W
Answer: A. W μ