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.
3.5 cm.
1.5 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 stress in the wire?
(The Young's modulus for aluminum is 7.0 x 1010 N/m²).
9.3 x 10⁷ N/m².
6.2 x 10⁷ N/m².
1.2 x 10⁸ N/m².
3.1 x 10⁷ N/m².
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.
0.89 mm.
0.11 mm.
0.22 mm.
