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A vinyl record (disk) starts from rest and then rotates about its central axis reaching playing speed of 33 1/3 rmp in 2.5 seconds. The record has a diameter of 32 cm and a mass of 0.40kg. in the interval from t=0 to t=2.5 seconds calculate
a. the final angular velocity in radians/sec.
b. the average linear speed of a point on the outside edge of the disk.
c. the total angular displaement.
d. the amount of torque required.
e. calculate the final angular velocity of the two records when another record, (disk with a diameter of 24cm and a mass of 0.20kg) drops down on top of the original.
A 1500 kg car traveling at a speed of 20 m/s skids to a halt on wet concrete where kinetic friction= 0.20. How far are the skid marks.
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A 50g marble moving at 2.2m/s strikes a 30g marble at rest. Assume the collision is perfectly elastic and the marbles collide head-on. What is the speed of the first marble
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An x-ray photon with wavelength 15.0 pm is scattered at 84.0 degrees by an electron, find the resulting kinetic energy of the electron
A certain superconducting magnet in the form of a solenoid of length 0.40 m can generate a magnetic field of 14.0 T in its core when its coils carry a current of 95 A. Find the number of turns in the solenoid
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Digital bits on a 12.0-cm diameter audio CD are encoded along an outward spiraling path that starts at radius R1=2.5cm, Determine the total length of the spiraling path
A stunt pilot performs a circular dive of radius 715m. At the bottom of the dive pilot has a speed of 265 m/s which at that instant is increasing at a rate of 15 m/s2(along the direction of vector B) What total acceleration does the pilot have at ..
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons, How many electrons are there in 1.79 liters of water
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