Physics, 14.03.2020 01:52, edmistontrace53
In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. The cylinder begins to rotate about a vertical axis. Then the floor on which the passengers are standing suddenly drops away! If all goes well, the passengers will "stick" to the wall and not slide. Clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. What is the minimum rotational frequency for which the ride is safe?
Answers: 3
Physics, 21.06.2019 22:50, Jasten
A23 kg log of wood begins from rest, 300 m up a sluice (a water track used to transport logs, think of it as an inclined plane with negligible friction) inclined at 20° to the horizontal. after it reaches the flat waterway at the bottom it collides elastically with a 100 kg block of wood initially at rest near the base of the incline. (a) how long does it take the 23 kg log to travel down the incline? (b) what is the speed of the 23 kg log at the bottom of the incline? (c) what are the velocities of both blocks of wood after the collision? (d) what is the total kinetic energy before the collision? (e) what is the kinetic energy of the 23 kg log after the collision? (f) what is the kinetic energy of the 100 kg block of wood after the collision? (g) what is the total kinetic energy after the collision? (h) compare the total initial and total final kinetic energies. is this consistent with what you would expect for elastic collisions? explain!
Answers: 1
Physics, 22.06.2019 08:00, cia196785920
If a balloon is taken outside on a very cold day, what will occur?
Answers: 1
Physics, 22.06.2019 12:30, shotocaffe
What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery
Answers: 1
Physics, 22.06.2019 18:30, zoelynn9104
Examples of states of consciousness include a. daydreaming b. dreaming during sleep c. hypnosis d. all of the above
Answers: 2
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