Aperson with mass mp = 78 kg stands on a spinning platform disk with a radius of r = 1.68 m and mass md = 180 kg. the disk is initially spinning at ฯ = 1.6 rad/s. the person then walks 2/3 of the way toward the center of the disk (ending 0.56 m from the center). 1) what is the total moment of inertia of the system about the center of the disk when the person stands on the rim of the disk? kg-m2 2) what is the total moment of inertia of the system about the center of the disk when the person stands at the final location 2/3 of the way toward the center of the disk? kg-m2 3) what is the final angular velocity of the disk? rad/s 4) what is the change in the total kinetic energy of the person and disk? (a positive value means the energy increased.) j 5) what is the centripetal acceleration of the person when she is at r/3? m/s2 6) if the person now walks back to the rim of the disk, what is the final angular speed of the disk?
Answers: 2
Physics, 22.06.2019 07:20
Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?
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Physics, 22.06.2019 08:30
Pl asaaap ! match the term to the correct description. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. movement that is like a t transfers energy from one location to another 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave
Answers: 1
Physics, 22.06.2019 09:30
An electric clothes dryer has a resistance of 8 ohms. it draws 30 a of current. what is the voltage, in volts, of the wall outlet that it is plugged into?
Answers: 2
Aperson with mass mp = 78 kg stands on a spinning platform disk with a radius of r = 1.68 m and mass...
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