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?
1.0 x1012 N/m².
1.0 x 1011 N/m².
2.5 x 1010 N/m².
2.5 x 1012 N/m².
A mass is hung from identical wires made of aluminum, brass, copper, and steel.
Which wire will stretch the least?
Steel.
Copper.
Aluminum.
Brass.
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.
2.5 cm.
4.5 cm.
3.5 cm.
1.5 cm.
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?
6.60 J.
3.55 J.
3.30 J.
3.60 J.
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?
3.1 x 10⁻⁵ m.
3.2 x 10⁻⁶ m.
8.0 x 10⁻⁷ m.
7.8 x 10⁻⁶ m.
