A mass of 50 kg is suspended from a steel wire of diameter 1.0 mm and length 11.2 m.
How much will the wire stretch?
The Young's modulus for steel is 20 x 1010 N/m².
1.5 cm.
4.5 cm.
2.5 cm.
3.5 cm.
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?
0.10 m
1.0 m.
0.01 m.
10 m.
A wire of diameter 0.20 mm stretches by 0.20% when a 6.28N force is applied.
What is the elastic modulus of the wire?
2.5 x 1010 N/m².
2.5 x 1012 N/m².
1.0 x1012 N/m².
1.0 x 1011 N/m².
A mass is hung from identical wires made of aluminum, brass, copper, and steel.
Which wire will stretch the least?
Copper.
Steel.
Brass.
Aluminum.
