Physics, 25.04.2020 22:48 jsjsjsskakwkowwj
As a descending elevator approaches the correct floor, it slows to a stop with a constant acceleration of magnitude 1 ms21\,\dfrac{\text{m}}{\text{s}^2} 1 s 2 m 1, start fraction, start text, m, end text, divided by, start text, s, end text, squared, end fraction . The elevator descends 4.5 m4.5\,\text{m} 4.5m 4, point, 5, start text, m, end text while it is slowing. We want to find how many seconds the elevator takes to slow to a stop.
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Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?
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As a descending elevator approaches the correct floor, it slows to a stop with a constant accelerati...
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