Aski that is placed on snow will stick to the snow. however, when the ski is moved along the snow, the rubbing warms and partially melts the snow, reducing the coefficient of friction and promoting sliding. waxing the ski makes it water repellent and reduces friction with the resulting layer of water. a magazine reports that a new type of plastic ski is especially water repellent and that, on a gentle 200 m slope in the alps, a skier reduced his top-to-bottom time from 47.94 s with standard skis to 33.94 s with the new skis. determine the magnitudes of his average acceleration with each pair of skis. acceleration with old model ski? acceleration with new model ski? assuming a 4.0° slope, compute the coefficient of kinetic friction for each case. old model ski coefficient of friction? new model ski coefficient of friction?
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Physics, 22.06.2019 07:00
We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?
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Which atomic model was proposed as a result of j. j. thomson’s work?
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Physics, 22.06.2019 19:10
3. a worker pushes a 30.5 kg polished stone along a polished table with a force on bonin a straight line for 5.20 s after starting from rest. there is no friction between thestone and the table. at the end of the table. the stone is hooked to a cable with a lengthof 62.0 cm to rotate it to a rough table to store until they can be picked up. the roughtable has a coefficient of static friction 0.702 with the polished stone. remember that 8= 9.80 m/s2a) what is the speed of the stone when it is hooked to the cable? b) what is the tension in the cable while the stone is rotating? (there is still nofriction)c) how much force is needed to make the stone begin sliding from rest on therough table? ius = 0.70262.0 cm30.5 kg20.5 kg6= 0
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Physics, 23.06.2019 01:30
Which statements did both aristotle and ptolemy assume? check all that apply.
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Aski that is placed on snow will stick to the snow. however, when the ski is moved along the snow, t...
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