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A disk is initially at rest undergoes constant angular acceleration. After accelerating for 3.1 s, te disk hasturned to an angle of 120 degrees.a) what was the angular acceleration of the diskb) what is its angular speed as the disk turned 120 degrees.The angular acceleration continues until the disk is spinning at300 rev/min. A break is then applied that causes the disk to slow at a constant deceleration of 1.0 rad/sec^2.c) how long does it take the brake to bring the disk to a stopd) through what angle does the disk spin while coming to a stop
Mary runs off a diving board with a velocity of 1.7 m/s in the horizontal direction. If the water surface is 2 meters below the board: A. how long will it take for her to hit the water B. where will she hit the water C. With what velocity will she..
On a banked race track, the smallest circular path on which cars can move has a radius of 106 m, compute the largest speed at which cars can move on this track without relying on friction
Figure skater is spinning at a rate of 1.0 rev/s with her armsoutstretched. She then draws her arms in to her chest,reducing her rotational inertia to 67% of its original value. What is her new rate of rotation?
A defibrillator consists of a 15.3-µF capacitor that is charged to 8.4 kV. What is the average power delivered to the tissues?
A 1.08 kg mass is at the center of a uniform spherical shell of mass 1.05 1020 kg and radius 1.11 106 m. Find the resultant gravitational force on the mass
A long straight wire carries a current that is increasing at the rate of one ampere per microsecond. find In which direction will current flow in each loop
An object with a mass of m = 4.6 kg is attached to the free end of a light string wrapped around a reel of radius R = 0.265 m, determine the velocity when it hits the floor
In an L-R-C series circuit, the resistance is 360 ohms, the inductance is 0.360 henrys, and the capacitance is 1.20×10?2 microfarads. What is the resonance angular frequency ?0 of the circuit? (answer should be in rad/s)
You know your mass is 62kg , but when you stand on a bathroom scale in an elevator, it says your mass is 90kg. What is the acceleration of the elevator
Light of wavelength 380 nm is required to cause electrons to be ejected from the surface of a metal. What is the kinetic energy of the ejected electrons
What if the acceleration is not constant? A particle starts from the origin with velocity 6i m/s at t = 0 and moves in the xy plane with a varying acceleration given by a = (2?tj) m/s2, find the position of the particle as a function of time
Suppose you're building a scale model of the hydrogen atom, and the nucleus is represented by a ball of radius 3.2 cm (about the radius of a baseball)
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