Imagine that a new monorail system is being planned for Sydney. The trains will run on elevated tracks, 15 m high. A single square concrete post, 5 cm on a side, supports each segment of the track. How much of a sideways force can the track segments withstand without moving sideways by more than 1 mm? You may assume that the force shears the concrete support posts. The shear modulus of concrete is 2.2x109 N m-2.
A)14 700 000 N.
B)1 470 000 N.
C)147 000 N.
D)14 700 N.
E)1470 N.

Question

Quizplus · Accepted Answer

The Answer of Imagine that a new monorail system is being planned for Sydney. The trains will run on elevated tracks, 15 m high. A single square concrete post, 5 cm on a side, supports each segment of the track. How much of a sideways force can the track segments withstand without moving sideways by more than 1 mm? You may assume that the force shears the concrete support posts. The shear modulus of concrete is 2.2x109 N m-2.
A)14 700 000 N.
B)1 470 000 N.
C)147 000 N.
D)14 700 N.
E)1470 N.

Imagine That a New Monorail System Is Being Planned for Sydney