Stewart – Calculus ET 8e Chapter 17 Form F
____ 17. A spring with a -kg mass has natural length m and is maintained stretched to a length of
m by a force of N. If the spring is compressed to a length of m and then released with
zero velocity, find the position of the mass at any time . Select the correct answer.
a.
b.
c.
d.
e.
____ 18. A spring with a mass of kg has damping constant 28 and spring constant . Find the damping
constant that would produce critical damping. Select the correct answer.
a.
36 195
b.
2340
c.
d. 9
e.
6 195
19. Suppose a spring has mass M and spring constant k and let . Suppose that the damping
constant is so small that the damping force is negligible. If an external force is
applied (the applied frequency equals the natural frequency), use the method of undetermined
coefficients to find the equation that describes the motion of the mass.
20. Use power series to solve the differential equation.