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The student sits on a pivoted stool while holding a weight ineach outstretched hand. The stool rotates about a verticalaxis through its center. The moment of intertia of thestudent, weights, and stool is 2.2.5 kg-m2 , and theinitial angular speed is 5.0 rads/s. As the student rotateson the stool, the weights are pulled inward so that the new momentof inertia becomes 1.80 kg-m2. Calculate the new angular speed of the system.
An 24 g rifle bullet traveling 370 m/s buries itself in a 4.8 kg pendulum hanging on a 2.6 m long string, which makes the pendulum swing upward in an arc. find the maximum vertical displacement of the pendulum.
A 0.80 kg ball and a 4.20 kg ball are connected by a 78.0 cm long massless, rigid rod. The structure rotates about its center of mass at 250 rpm. What is the rotational kinetic energy of the structure?
A hunter is standing on flat ground between two vertical cliffs that are directly opposite one another. He is closer to one cliff than the other. find the distance (in m) between the cliffs
A man riding a bicycle 140kg together is traveling at 8.6 m/s due north when he is brought to a stop in .50 seconds by a gazelle running to the south. Calculate the average force exerted on the gazelle
The coefficient of kinetic friction for wood sliding on wood is 0.20. What is the final speed of the bullet
A very short solenoid contains N = 20 circular loops of wire. The radius of the loop is R = 0.5 meters, what is the magnetic field in the center of the solenoid
A speaker with acoustic power 80 mW produces a steady tone. Consider the speaker as a point source and take the speed of sound to be 340 m/s.
A point charge of +2Q is placed at the center of a square. When a second point charge of -Q is placed at one of the square's corners, it is observed that an electrostatic force of 4 N acts on the positive charge at the square's center.
The puck in the figure below has a mass of 0.280 kg. Its original distance from the center of rotation is 40.0 cm, and it moves with a speed of 75.0 cm/s. Determine the work done on the puck
A girl on a sled coasts down a hill. Her speed is 7.60 m/s when she reaches level ground at the bottom. The coefficient of kinetic friction between sled's runners and the hard, icy snow is 0.04, and the girl and sled together weigh 644N.
A thin, light wire is wrapped around the rim of a wheel, The wheel rotates without friction about a stationary horizontal axis that passes through the center of the wheel. what is the mass of the wheel
A transparent film has a thickness of 0.003250 cm, and a refractive index of 1.4000. Find the order of interference at theta=0 degrees
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