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A 200-kg merry-go-round in the shape of a uniform, solid, horizontal disk of radius 2.0 m is set in motion by wrapping a rope about the rim of the disk and pulling on the rope. A force of 60 N is exerted on the rope to bring the merry-go-round to rotate from rest. How long is the elapsed time from rest to an angular speed of 1.8 rad/s? The moment of inertia of a solid disk is Πmr2.
An 845-N sled is pulled a distance of 173 m. The task requires 1.20 x 10^4 J of work and is done by pulling on a rope with the force of 142 N. At what angle is the rope held.
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 56.11 diopters, and the lens-to-retina distance is 1.791 cm. (a) How far is the blackboard from her eyes? (b) If the writing on the blackboard i..
A wire 6.10m long with diameter of 2.00mm has a resistance of 0.0280?. Find the resistivity of the material of the wire
a 3.77-kg ball of clay is thrown downward from a height of 3.47 m with a speed of 4.81 ms onto a spring with k 1690
Is momentum conserved in all of the experiments? Please give a complete description with examples as needed supporting your response.
A physics student is standing on an initially motionless,frictionless turntable with rotational inertia 0.31kg·m2. He's holding a wheel of rotational inertia0.22 kg·m2 spining at 125 rpm about a vertical axis, as we showed in Fig.11.8.
A pipe of 20 cm diameter is carrying a discharge of 0.1 m3/sec. If the diameter of the pipe is reduced to 5 cm at its end, calculate the velocity and velocity head at the pipe outlet.
Use the ideal gas approach to find the thermal velocity, and determine the scaling law based on the resulting equation
A rms AC voltage of 118 V at 60 Hz is applied to an RLC circuit with 11.8 mH inductor, 0.171 µF capacitor, and 43.1 ? resistor in series. What is the power factor of the circuit
A vacuum cleaner produces sound by a measured sound level of55.0 dB. What is the intensity of this sound in W/m2? What is the pressure amplitude of the sound?
Find the location of the center of mass of this system by setting x=0 at the left end of the beam. Find the location of the center of mass of this system by setting x=0 at the right end of the beam.
a non rotation cylyndrical disk of moment of inertia.I is dropped onto an identical disk roating at angular speed w. what is the final common angular speed of the two disks
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