Physics, 08.12.2019 07:31 lisaboden1701
Metallic noises echo in stella's suit; a thin layer of stiff material separates her from the deadly vacuum of space. stella collects meteoroids. ones that contain rare metals, like platinum and gold. they can be sold back home. ***beep-beep-beep*** an alarm. her controls are unresponsive. every second she drifts 1 meter further away from her space capsule. "quick, quick, think," the 60.0 kg astronaut whispers to herself urgently. as if by instinct, her training takes over. she looks down at the 26.4 kg meteoroid in her hands and quickly throws it with all of her strength at 4.8 m/s in the direction opposite to the space capsule. her new velocity, after throwing the rock, is m/s toward the space capsule. "success! "
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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. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm
Answers: 1
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