Physics, 13.09.2019 01:30, shadekashakay
Afootball is kicked vertically upward from the ground and a student gazing out of the window sees it moving upward past her at velocity u. the window is a height h above the ground. you may ignore air resistance. how high does the football go above ground?
Answers: 3
Physics, 21.06.2019 19:20, Obeilskzexal
Aferris wheel is a vertical, circular amusement ride with radius 9 m. riders sit on seats that swivel to remain horizontal. the ferris wheel rotates at a constant rate, going around once in 9 s. consider a rider whose mass is 56 kg. at the bottom of the ride, what is the perpendicular component of the rate of change of the rider's momentum? at the bottom of the ride, what is the vector force exerted by the seat on the rider?
Answers: 1
Physics, 21.06.2019 22:10, smiley0326
Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley
Answers: 3
Physics, 21.06.2019 22:20, CM0
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 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage
Answers: 2
Afootball is kicked vertically upward from the ground and a student gazing out of the window sees it...
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