A hedgehog pushes a rock of 19 kg up a ramp which is tilted
A hedgehog pushes a rock of 1.9 kg up a ramp, which is tilted at 19.5 degrees to horizontal, at a constant speed of 0.25 m/s for 1.5 minutes, using a force of 7.12N. How much work is done by friction?
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a hedgehog pushes a rock of 19 kg up a ramp which is tilted at 195 degrees to horizontal at a constant speed of 025 ms
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A 2016 survey of undergraduate students considered this further and found that compared with students that did not use cannabis at least once
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