A mass is hung from identical wires made of aluminum, brass, copper, and steel.
Which wire will stretch the least?
Copper.
Brass.
Steel.
Aluminum.
A steel lift column in a service station is 4.0 m long and 0.20 m in diameter. Young's modulus for steel is 20 x 1010 N/m².
By how much does the column shrink when a 5000-kg truck is on it?
7.8 x 10⁻⁶ m.
8.0 x 10⁻⁷ m.
3.1 x 10⁻⁵ m.
3.2 x 10⁻⁶ m.
A cable is 100-m long and has a cross-sectional area of 1 mm². A 1000-N force is applied to stretch the cable.
The elastic modulus for the cable is 1.0 x 1011 N/m². How far does it stretch?
0.01 m.
10 m.
0.10 m
1.0 m.
A 55-cm brass rod has a diameter of 30 cm. The compressive strength of steel is 250 x 106 N/m².
What is the compression force that would break the rod?
1.4 x 10⁸ N.
4.5 x 10⁸ N.
1.8 x 10⁷ N.
2.4 x 10⁸ N.
The graph shows the behaviour of a sample of a metal when it is stretched until it starts to undergo plastic deformation. What is the estimated work done in stretching the sample from zero extension to 12.0 mm?
3.60 J.
6.60 J.
3.55 J.
3.30 J.
