Suppose the Ends of a 20-M-Long Steel Beam Are Rigidly $\degree$

Multiple Choice

Suppose the ends of a 20-m-long steel beam are rigidly clamped at 0 $\degree$ C to prevent expansion.The rail has a cross-sectional area of 30 cm².What force does the beam exert when it is heated to 40 $\degree$ C? (a_steel = 1.1 x 10^-5/C $\degree$ ,Y_steel = 2.0 x 10¹¹ N/m²) .

A) 2.6 x 10⁵ N
B) 5.6 x 10⁴ N
C) 1.3 x 10³ N
D) 6.5 x 10² N