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Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?
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1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving
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Physics, 22.06.2019 08:30
What object a collides with object b and bounces back its final momentum is?
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