# dvd_Key7 - Part 1 Circle the correct answer Each is worth 5...

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Part 1: Circle the correct answer. Each is worth 5 points. 1. A floating disk is currently motionless on an air hockey table, with low enough friction we can ignore that force. If I apply a 20N eastward force at the north edge and a 20N westward force at the south edge, is the disk in static equilibrium? YES 2. Same setup as # 1. I apply a 20N eastward force at the west edge and a 20N westward force at the east edge. Is the disk in static equilibrium? NO 3. Hammers are heavy at the far end, because that gives them a lower moment of inertia and you can make them go faster for the same angular impulse. TRUE 8 4. If energy loss to friction is small enough to ignore, which of these has the most rotational kinetic energy at the bottom of a ramp, if they're all released from the same height? A. 20 kg solid cylinder 25 cm in radius and 150 ern long B. 10 kg solid disk 35 em in radius and 10 em thick . 40 kg solid pole 10 ern in radius and 400 cm long 'fr1p r 5f L ... ,,"h vt !J f! ,,1 ~ /} I 5. A simple pendulum is only considered a "Simple Harmonic Oscillator"

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dvd_Key7 - Part 1 Circle the correct answer Each is worth 5...

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