Physics, 26.11.2019 02:31 kaitlynbrace9742
Jonathan is riding a bicycle and encounters a hill of height 7.30 m. at the base of the hill, he is traveling at 6.00 m/s. when he reaches the top of the hill, he is traveling at 1.00 m/s. jonathan and his bicycle together have a mass of 85.0 kg. ignore friction in the bicycle mechanism and between the bicycle tires and the road. (a) what is the total external work done on the system of jonathan and the bicycle between the time he starts up the hill and the time he reaches the top? (b) what is the change in potential energy stored in jonathanâs body during this process? (c) how much work does jonathan do on the bicycle pedals within the jonathan-bicycle-earth system during this process?
Answers: 3
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Aflute player hears four beats per second when she compares her note to a 523 hz tuning fork (the note c). she can match the frequency of the tuning fork by pulling out the âtuning joinâ to lengthen her flute slightly. what was her initial frequency?
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Jonathan is riding a bicycle and encounters a hill of height 7.30 m. at the base of the hill, he is...
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