Question: 7. A spring with spring constant 2.5 N/cm has a force of 10 N applied to it (stretching it). How much does the spring stretch?

7. A spring with spring constant 2.5 N/cm has a force of 10 N applied to it (stretching it). How much does the spring stretch?

a. 4

b. 2.5

c. 10

d. 3

9. A construction crane with a 5 cm diameter cable can endure a maximum stress of 138 MPa. What is the maximum load the cable can endure?

a. 1,083,330

b. 270,825

c. 2,708

d. 10,833

10. What is the relationship between the potential and kinetic energy of an object oscillating while attached to a spring?

12. A 2.5 kg mass is attached to a spring with a constant, k= 300 N/m. What is the angular frequency of its motion?

a. 8.8

b. 21.8

c. 5.7

d. 11

13. Give a definition of stress and of strain. Also tell how Young's modulus relates to stress and strain.

15. How is the formula for Simple Harmonic Motion modified for when the motion is damped? What does increasing the damping coefficient do to the graph of the motion?

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