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A pulley, with a rotational inertia of 3.2×10-3kg m2 about its axleand a radius of 8.0 cm, is acted on by a force applied tangentially at its rim. The force magnitude varies in time as F =0.46t + 0.32t2, where F is in newtons if t is given in seconds. The pulley is initially at rest. At t = 3.4 s what is its angular acceleration? At t=3.4s what is the angular velocity.
The small piston of a hydraulic lift has a diameter of 8.70 cm , and its large piston has a diameter of 44.0 cm. Determine the pressure applied to the fluid in the lift
A person, sitting on a stool rotating at a rate of 21 rpm, holds masses in each hand. When their arms are outstretched , the total rotational inertia of the system is 3.7 kg·m2. what is the new angular velocity of the system
The masses of the particles are m1 = m3 = 5.0 kg and m2 = m4 = 8.0 kg. Find out the moment of inertia of the system about the z axis.
An airplane must reach a speed of 189mi/h to take off. If the runway is 472m long, what is the minimum value of acceleration that will allow the airplane to take off successfully.
In and 8.00 km race, one runner runs at a steady11.0 km/h and another runs at 14.0 km/h. How far from the finish line is the slower runner
You hit a 0.2 kg golf ball up at 40o from the horizontal. It travels for 4.86 s and stops on an elevated green 10 m above its initial height traveling down at an angle of 35.4o below the horizontal
a uniform meter stick with a mass of 135 g rotates about an axis perpendicular to the stick passing through the center
The core of an optical fiber has an index of refraction of 1.27, What is the critical angle for total internal reflection at the core-cladding interface
A 300 kg elevator is being pulled upwards by a steel cable at a constant velocity. What is the net force on the elevator
You are an astronaut (m = 115 kg) and travel to a planet that is the same mass and size as Earth. This new planet, however, rotates more rapidly with a period of only 4 h. Considering the centripetal acceleration caused by this rotation, what is the ..
A Carnot-efficiency engine operating between a reservoir of liquid mercury at its melting point, What is the temperature of the colder reservoir
A dentist's drill starts from rest. After 3.20 s of constant angular acceleration it turns at a rate of 2.3 104 rev/min. Find the drill's angular acceleration
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