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A wheel free to rotate about its axis that is not frictionless is initially at rest. A constant external torque of +53 N·m is applied to the wheel for 22 s, giving the wheel an angular velocity of +610 rev/min. The external torque is then removed, and the wheel comes to rest 120 s later. (Include the sign in your answers.) (a) Find the moment of inertia of the wheel. (b) Find the frictional torque, which is assumed to be constant.
A hunter on a frozen, essentially frictionless pond uses a rifle that shoots 4.20 g bullets at 975 m/s. The mass of the hunter (including his gun) is 68.5 kg, and the hunter holds tight to the gun after firing it. a) Find the recoil velocity of the h..
A house painter stands 3 m above the ground on a 5.4-m-long ladder that leans against the wall at a point 4.7 m above the ground. The painter weighs 635 N and the ladder weighs 158 N. Assuming no friction between the house and the upper end of the la..
A charge +Q0 is distributed uniformly througout a non- conductiong sphere of radius R0 the sphere also has a point charge -q0 at its center. a) what is the electric field outside of the sphere at a distance r from the sphere center? b) what is the el..
Consider two semi-infinite sheet with equal magnitude, but opposite sign, surface charge densities. The plates are 0.2 m apart and have a voltage of 3 V across them. An electron enters from left through hole at velocity v0
A point mass consisting of 26 charged particles travels at a velocity of magnitude 7.80 x 107 m/s through a uniform magnetic field of magnitude 10.2 T. Each charged particle has a charge of -12e and a mass of 3.60 x 10-29 kg. The angle between the..
A car engine is initially rotating at 60 rad/s. It is then turned off and takes 5.00 s to come to a complete stop. What is the angular acceleration of the engine? Assume acceleration is constant.
A coordinate system (in meters) is constructed on the surface of a pool table, and three objects are placed on the table as follows: a 8.0 kg object at the origin of the coordinate system, a 16.0 kg object at (0, 2.0), and a 18.0 kg object at (4.0, 0..
A cylinder made of insulating material has a uniform volume charge density. The cylinder is 20m in length and a radius 0.2m. The total charge on the cylinder is 4nC. Half way down the cylinder's length, what is the electric field outside the cylinder..
An inductor in the form of a solenoid contains 410 turns and is 12.8 cm in length. A uniform rate of decrease of current through the inductor of 0.421 A/s induces an emf of 175 µV. What is the radius of the solenoid? In mm
A ball is dropped from a height of 10 ft onto a level floor. If the coefficient of restitution is 0.9, how long will it take the ball to come to rest? Also, what is the total distance traveled by the ball.
A small package rests on the horizontal dashboard of a car. If ?s = 0.302, what is the minimum acceleration of the car
q1. a sealed bottle has water in it and two tubes enter the bottle through the seal. tube b is attached to a pump at
A 1.3 m length of wire carrying 5.9 A of current toward the south is oriented horizontally. Estimate the magnitude of the magnetic force on the wire due to the Earth's magnetic field of 5.5 ? 10-5 T at this point
A 15.0kg bucket of water is suspended by a rope of negligible weight that is wrapped around a solid cylinder 0.300m in diameter, What is the tension in the rope while the bucket is falling
A slab of a thermal insulator with a cross-sectional area of 120cm2 is 3.00cm thick
A lamp which is 9.0 cm tall is in front of a concave mirror which has a focal length of 53.0 cm. (a) How tall is the lamp's image if the lamp is a distance of 26.5 cm from the mirror (include sign if negative)
The athlete shown in the figure rotates a 1.00 kg discus along a circular path of radius 1.05 m. Determine the magnitude of the maximum radial acceleration of the discus
The electric potential in a certain area is given as: V = 3x^2 + 5yz. what is the electric field in the area
At a certain instant a particle (mass=0.5 kg) is moving in the +x direction with velocity 14 m/s. What is the magnitude of the momentum of the particle (in kg*m/s) at the end of this 0.15 second interval
In a double-slit experiment, slits separated by 1.290e-4 m are illuminated by a coherent 571 nm light source. What is the angular position of the first bright fringe
A dense rubber buoy is attached to a lead weight when it is accidentally lost overboard from an ocean going vessel. The density of the buoy at the surface was 661 kg/m^3.
A person with bifocal vision has a prescription of -1.75D/+1.50D, which represents the refractive power of the lenses to correct myopia and presbyopia, respectively. What is the focal length of each lens
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