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collision? (b) By how much does the period change?
The sum oes the energy change? pivot point for
(c) By how much dof the torques about the(d) Account at equilibrium (θ = 0) is given by considering the
weight of the
the change in energy. plank acting about its center of mass and the restoring force of the spring. The plank
y
63. A simple may be treated as length of 2.23 m and a L/ass of the pivot point, while the spring force acts at
pendulum with a a point mass a distance m 2 from
6.74 kg isagdistance initial equilibrium, the net at its equilibbe zero.
iven an L. At speed of 2.06 m/s torque must
L
L
rium position. Assume it undergoes simple harmonic
motion, and determine img a)L eriod, (L = otal energy, and
(16)
τ = − ts ( p + kxo b) t 0
Figure P15.67
2
(c) maximum angular displacement.
mg
(17)
64. Review problem. xone end of a light spring with force conO=
2k
stant 100 N/m is attached to a vertical wall. A light string is
68.
When a block of mass M, connected to the en
tied to the other end of the horizontal spring. The string
spring of mass ms 7.40 g...
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 Fall '08
 StanJones
 Physics, Work

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