PART A :During a wrestling match, a110kg wrestler briefly stands on one hand during a maneuver designed to perplex his already moribund adversary.

l = 39 cm r = 2.15 cm m = 110 kg

By how much does the upper arm bone shorten in length in meters? The bone can be represented by a uniform rod 39 cm in length and 2.15 cm in radius with a Young's modulus of 1.6 10¹⁰N/m².

L =

PARTB A suspension bridge oscillates with an effective force constant of0.95 10⁸N/m.

If soldiers march across the bridge with a cadence equal to the bridge's natural frequency and impart0.75 10⁴J of energy to the bridge's oscillation each second, how long, in seconds, does it take for the bridge's oscillations to go from an amplitude of0.11m to0.515m?