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A man stands on a platform that is rotating (without friction) withan angular speed of 1.18 rev/s; his arms are outstretched and heholds a brick in each hand. The rotational inertia of the systemconsisting of the man, bricks, and platform about the central axisis 7.28 kg·m2. If by moving the bricks the mandecreases the rotational inertia of the system to 2.70kg·m2,
(a) what is the resulting angular speed of the platform and
(b) what is theratio of the new kinetic energy of the system to the originalkinetic energy?
two spherical objects are separated by a distance of 1.41 times 10-3 m. the objects are initially electrically neutral
A 1105 kg automobile is pulled by horizontal tow line with a net force of 816 N. What is the acceleration of the auto? (Neglect friction.) =----m/s^2
A large turntable rotates about a fixed vertical axis, making one revolution in 5.00 s. What is the angular speed of the turntable when the child is 2.50 from the center, assuming that you can treat the child as a particle
A 0.15-kg bullet is fired with a velocity of 86.9 m/s into a solid cylinder of mass 24.1 kg and radius 0.23 m. Find the angular speed of the system after the bullet strikes and adheres to the surface of the cylinder
Determine the flux of particles escaping from the exobase of Earth's atmosphere using a number density at the exobase of 10^5 particles/cm^3 and a temperature of 700K.
Charged Metal Sphere A charged metal sphere ofradius 11 cm has a net charge of2.0 10-8 C. What is the electric field at the sphere'ssurface? what is the electric potentialat the sphere's surface?
A 56.0-μF capacitor is connected to a generator operating at alow frequency. The rms voltage of the generator is 4.00 V and isconstant. A fuse in series with the capacitor has negligible resistance and will burn out when the rms current reaches 11.0 ..
two cylinders are made of the same unknown material. the first has a radius r1 resistance r1 and mass m1. the second
A runner weighs 635 N (about 140 lb), and 72% of this weight is water. How many moles of water are in the runner's body? moles
A 1 uF capacitor is charged when it is connected across a 9 V battery, Find the final charge and the voltage across the plates for the 1 uF and 2 uF capacitor
if the box is moving at a constant speed of 0.35m/s and the coefficient of kinetic friction is 0.12. What is the magnitude of F.
A loop of diameter d = 12 cm, carrying a current I = 0.4 A is placed inside a magnetic field B = (0.2 T) i^+ (0.4 T) j^. What is the potential energy of the loop
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