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.
3.5 cm.
4.5 cm.
2.5 cm.
An aluminum wire 2.0 m in length and 2.0 mm in diameter supports a 10.0-kg mass. What is the elongation of the wire?
(The Young's modulus for an aluminum is 7.0 x 1010 N/m²).
0.33 mm.
0.11 mm.
0.22 mm.
0.89 mm.
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.
3.30 J.
3.60 J.
3.55 J.
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 1012 N/m².
1.0 x1012 N/m².
2.5 x 1010 N/m².
1.0 x 1011 N/m².
