A 20 kg clock resting on the floor is to be raised by a 5.0 mm diameter rope with young's modulus 1.5 X 10^9 n/M^2. The rope goes up and over a pulley that is 2.5 m above the floor. You hold the at a point 1.5 m above the flow and pull hard enough to lift the block just off the floor. By how much does the rope stretch?
A. 3.0 mm
B. 6.3 mm
C. 9.3 mm
D. 13 mm
Ans: D. 13 mm
You might also like to view...
Explain the process that creates a nova
What will be an ideal response?
Areas always have dimensions _____ while volumes always have dimensions _____
a. m2, m3 b. L2, L3 c. Both a and b are correct. d. No answer is correct because of the "always.".
Which of the following types of cloud is found at the highest altitudes?
What will be an ideal response?
If sufficient force is applied to a crystal, it can be permanently deformed. Permanent deformation in metal crystals occurs due to atomic displacements on the planes that are most closely packed, and it happens in the most closely packed directions. Assume that a force is applied to a crystal of FCC copper that permanently stretches the crystal in the [001] direction. The (111) plane is one of the close-packed planes in FCC copper on which permanent deformation could occur.
(a) What is the angle between the [001] direction and the normal to the (111) plane? (b) Atom displacements along which close-packed directions within the (111) plane could contribute to the permanent deformation of the crystal in the [001] direction?