In the name of ALLAH, the most beneficient, the most merciful

Physics (PHY101)

Question (select most suitable option)

  A 4.0-m long steel beam with a cross-sectional area of 1.0 × 10-2 m2 and a Young's modulus of 2.0 × 1011 N/m2 is wedged horizontally between two vertical walls. In order to wedge the beam, it is compressed by 0.020mm. If the coefficient of static friction between the beam and the walls is 0.70 the maximum mass (including its own) it can bear without slipping is:
3.6 kg
36 kg
71 kg
710 kg