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An airplane propeller is 2.08 m in length (from tip to tip) and hasa mass of 117kg. The propeller is rotating at 2400 rev/minabout an axis through its' center.
a.) What is its rotational kinetic energy? Treat thepropeller as a slender rod
b.) If it were not rotating, how far would it have to drop infree fall to acquire the same kinetic energy?
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A person throws a rock straight up into the air. At the moment itleaves the person's hand it is going 33mph. When the rock reaches its peak, how fast is it going and what is the magnitude and direction of its acceleration?
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An investigation is performed using a apparatus. Electrons are accelerated from rest from the cathode by an electric potential difference. The cathode and anode are 2.00 x 10 ^-2 cm apart. The electrons reach a speed of 2.10 x 10^7 m/s as they pas..
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