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A student stands on a platform that is rotating without friction at 1.2 rev/s. His arms are outstretched and he holds a brick in each hand. The rotational inertia of the system (students, bricks and platform) about the central vertical axis is 6.0 kg-m^2. She moves the bricks inwards and reduces the rotational inirtia of the system to 2 kg- m^2.
what is the new angular speed of the system?
what is the ratio of the new system kinetic energy to the original system kinetic energy
what causes this chance in KE
What is the kinetic energy of α particle while it reaches the other plate? The distance between the plates is 33 cm.
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While a hybrid car brakes to come to a stop at a traffic light, describe the energy transfer and materials used to transfer of this energy
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A 62 kg person on skis starts from rest down a hill sloped at 40° from the horizontal. The coefficient of friction between the skis and the snow is 0.10.
George, Romeo's not often heard about older brother, was also quite in love with Juliet. One night he tried to climb a 10 m long, find the coefficent of friction between the ladder and the grass
Two tiny conducting spheres are identical and carry charges of -18.2 ?C and +50.3 ?C, What is the magnitude of the force that each sphere experiences
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A satellite revolves around a planet at an altitude equal to the radius of the planet. The force of gravitational interaction between the satellite and the planet is F_0. Then the satellite moves to a different orbit, so that its altitude is tripl..
An alpha particle is moving at a speed of 5.0 × 105 m/s in a direction perpendicular to a uniform magnetic field of strength 0.040 T. What is the radius of the path of the alpha particle
What is the magnitude of the negative point charge that must be fixed to the fourth corner, so that the charge at the diagonally opposite corner experiences a net force of zero?
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