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An electric fan is turned off, and its angular velocity decreases uniformly from 540 rev/min to 240rev/min in a time interval of length 3.65s
A) Find the angular acceleration in rev/s^2.
B) Find the number of revolutions made by the motor in the time interval of length 3.65s
C) How many more seconds are required for the fan to come to rest if the angular acceleration remains constant at the value calculated in part (A)?
A uniform electric field of magnitude 256 V/m is directed in the negative y direction. Through what potential difference did the charge move
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One side of the roof of a building slopes up at 43.5°. A roofer kicks a round, flat rock that has been thrown onto the roof by a neighborhood child. determine the maximum height the rock reaches above the point where it was kicked
Two cylinders have the same radius R = 0.6 m and length 0.6 m, but one is a solid cylinder of massM1 = 4.5 kg, What is the ratio of the final speed of the solid cylinder to that of the hollow cylinder
In a ballistics test, a 25.00 g bullet travelling horizontally at 1300m/s goes through a 20.00 cm thick 450 kg stationary target and emerges with a speed of 800m/s. The target is free to slide on a smooth horizontal surface. How long is the bullet..
Two solid spheres, each of mass m, are rolling without slipping with a speed v. If the spheres have radii R1 and R2 with R1/R2 = 7.3, what is the ratio of their kinetic energies
a 1.5 kg ball falls onto a floor. just before it strikes the floor its velocity is 12 m/s. the ball bounces up with a velocity of 10 m/s. find the impulse on the ball
A population of 500,000 around a nuclear facility receives an average wholebody dose of 0.5 rad as a result of an accidental release of radionuclides. Estimate the collective gonad dose received
A small body of mass 0.13 kg is undergoing simple harmonic motion of amplitude 9.0 cm and period 0.10 s. What is the maximum value of the force acting on it? If the oscillations are produced by a spring, what is the spring constant?
A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 132-kg laser sensor that measures the thickness of the ice, find the tension in the cable towing the sensor
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