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During a testing process, a worker in a factory mounts a bicycle wheel on a stationary stand and applies a tangential resistive force of 115 N to the tire's rim. The mass of the wheel is 1.70 kg and, for the purpose of this problem assume that all of this mass is concentrated on the outside radius of the wheel. The diameter of the wheel is 60.0 cm. A chain passes over a sprocket that has a diameter of 8.75 cm. In order for the wheel to have an angular acceleration of 4.60 rad/s2, what force must be applied to the chain? (Enter the magnitude only.)
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A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. What is the mass of the meter stick
At what energy does an electron become "relativistic"? Consider electrons with kinetic energies of 50 eV, 50 keV, and 50 MeV. When is it important to use the relativistic formulas
What is the free-fall acceleration at the surface of the moon and What is the free-fall acceleration at the surface of the Jupiter
If the electric field strength in air exceeds 3.0 ? 106 N/C, the air becomes a conductor, determine the maximum amount of charge that can be carried by a metal sphere4.9 m in radius
How much time is spent in pushing the mower
One of the moons of a planet orbits at a distance of 9375 km from the center of the planet. what is the period of the moon
A football is thrown with an initial upward velocity component of 15.0 and a horizontal velocity component of 17.5. How far has the football traveled horizontally from its original position
If the air in the tube is replaced with a different gas, the frequency of the fundamental standing wave changes to 60·Hz. What is the speed of sound in this new gas
A rail car that weighs 35 N is accelerated at 7.7 m/s/s for 5.6 seconds. How much work is done on the rail car
Two steel guitar strings have the same length. String A has a diameter of 0.59 mm and is under 450.0 N of tension. String B has a diameter of 1.2 mm and is under a tension of 800.0 N. Find the ratio of the wave speeds, va/vb, in these two strings.
A 9-g bullet is fired from a rifle. It takes 3.30 10-3 s for the bullet to travel the length of the barrel, find the average net force exerted on the bullet
Heather and Jerry are standing on a bridge 46 above a river. Heather throws the rock straight down with a speed of 20. Jerry, at accurately the same instant of time, throws a rock straight up with the same speed. Overlook air resistance.
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