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A rod of mass 0.300 kg and length 0.36 m has four small balls mounted on it. Two balls (shown in red on the diagram), each of mass 0.84 kg, are mounted at opposite ends of the rod. Two other balls, each of mass 0.24 kg (shown in blue on the diagram), are each mounted a distance 0.09 m from the center of the rod. The rod rotates on an axle during the center of the rod (indicated by the "x" in the diagram), perpendicular to the rod, and it takes 1.0 seconds to make one full rotation.
stick_4balls
1) What is the kinetic energy of this object?
2) What is the angular speed of the rotating device?
3) What is the moment of inertia of the device about its center?
Suppose that when a 12.0-V battery drives a current of 6.7 A through a resistive device, How much is the internal resistance (in ohms) of the 12.0-V battery
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you were directed to measure the angle of reflection when the ray was incident on either side of the normal to the
a cannon fires a 9 lb projectile with an initial velocity of 60 ms at an angle of 15 degrees. assuming that air
There are four charges, each with a magnitude of 2.0μC. Two are positive and two are negative. The charges are fixedto the corners of a 0.30 m square, one to a corner, in such a waythat the net force on any charge is directed toward the center oft..
The average speed of a nitrogen molecule in air is about 6.70 * 10^2 m/s, and its mass is about 4.68 * 10^-26 kg. What average force does the molecule exert on the wall
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