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).
0.89 mm.
0.11 mm.
0.22 mm.
0.33 mm.
A 5000-N force compresses a steel block by 0.0025 cm.
How much force would be needed to compress the block by 0.0125 cm?
5000 N.
25000 N.
1000 N
2500 N
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 x 1011 N/m².
1.0 x1012 N/m².
A mass is hung from identical wires made of aluminum, brass, copper, and steel.
Which wire will stretch the least?
Aluminum.
Brass.
Steel.
Copper.
