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Aloaded ore car has a mass of 950 kg. and rolls on rails ofnegligible friction. it starts from rest ans is pulled up a mineshaft by a cable connected to a winch. the shaft is inclined at30.0 degrees above the horizontal. the car accelerates uniformly toa speed of 2.20m/s in 12.0s and then continues at constant speed.(a) what power must the winch motor provide when the car is movingat constant speed? (b) what maximum power must the winch motorprovide? (c) what total energy has transfered out of the motor bywork by the time the car moves off the end of the track, which isof length 1250m?
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Physics, 22.06.2019 16:50
During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.
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Aloaded ore car has a mass of 950 kg. and rolls on rails ofnegligible friction. it starts from rest...
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