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You have a lab setup to investigate rigid body rotation. A uniform disk of mass 1kg and radius 10cm can rotate around its center. It is accelerated by a string that is would around the outside of the disk and pulled on by a mass of 1/4 kg. (see sketch) You start the experiment from rest. Make a free body diagram for the pulling mass and a torque diagram for the disk. write the relevant newton's equation for linear and rotary acceleration. solve for the unknown accelerations and tension in the string. Recall the relation between angular and linear acceleration! After 0.5 sec by what angle has the disk spun and what is its angular speed at that moment.
a glider of length l moves through a stationary photogate on an air track. a photogate is a device that measures the
An upright object is placed a distance in front of a converging lens equal to twice the focal length (f1) of the lens. On the other side of the lens is a converging mirror of focal length f2 separated from the lens by a distance 2(f1+f2).
A kid of mass 30 kg is initially at the center of a merry-go-round, which we can model as a uniform disk. What is the angular speed of the merry-go-round now in rev/min
A particle moves in simple harmonic motion with afrequency of 3.20 Hz and an amplitude of4.40 cm. Find the maximum acceleration of the particle.
A transmitter is operating at 4.00 kW of power. what is the average intensity of the signal 8.00 km from the transmitter
A 0.318 kilogram mass is attached to a spring with a force constant of 12.5 N/m. compute what is the speed when it is 0.136 m from equilibrium
A ball is kicked with an initial velocity of 16 m/s in the horizontal direction and 14 m/s in the vertical direction. What maximum height is attained by the ball
An unbalanced electric motor is mounted on a vibration isolator. If the stedy-state amplitude of vibration of the motor is 20 mm at resonance and 5 mm away from resonance (w/wn =0), Determine the isolator damping ratio
The mass of the Space Shuttle orbiter is 8.8 x 104 kgand the period of its orbit is 82 minutes. Estimate thekinetic energy of the orbiter and the work done on it by gravitybetween the launch and orbit. (
The structure of GaAs is the zinclende lattice. The lattice is 1 m. Calculate the density of valence electrons in GaAs
A sound wave with an intensity level of 81.0 dB is incident on an eardrum of area0.600 10-4 m2. How much energy is absorbed by the eardrum in 4.0 minutes
A research submarine has a 10-cm-diameter window that is 8.5cm thick. What is the submarine's maximum safe depth in salt water
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