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.
4.5 cm.
1.5 cm.
2.5 cm.
3.5 cm.
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.
2500 N
25000 N.
1000 N
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).
0.22 mm.
0.11 mm.
0.33 mm.
0.89 mm.
A mass is hung from identical wires made of aluminum, brass, copper, and steel.
Which wire will stretch the least?
Aluminum.
Steel.
Copper.
Brass.
