Physics
Physics, 24.11.2019 19:31, shawn20034

In a physics lab, a 60-kg student runs up a 2.0-meter tall flight of stairs in 1.5 seconds. the work done to get to the top is 1200 joules. the student's power rating is approximately _w.

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Physics, 26.06.2019 02:10, abigail018
Work and energy a 68 kg students runs up a flight of stairs 3.5 meters high in 11.4 seconds. the student takes 8.5 seconds to run up the same flight of stairs during a second trial. determine the following: a. the work done in each trial. you should identify these values as w1 and w2. b. the power exerted by the student in each trial. you should identify these values as p1 and p2.
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Physics, 03.08.2019 23:00, Mumi2232
In a physics lab a 90 kg student runs up a 1.5 meter tall flight of stairs in 3.0 seconds. the students power rating is approximately
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Physics, 25.10.2019 21:43, anispotts
Energy is conventionally measured in calories as well as in joules. one calorie in nutrition is one kilocalorie, defined as 1 kcal = 4 186 j. metabolizing 1 g of fat can release 9.00 kcal. a student decides to try to lose weight by exercising. he plans to run up and down the stairs in a football stadium as fast as he can and as many times as necessary. to evaluate the program, suppose he runs up a flight of 85 steps, each 0.150 m high, in 50.0 s. for simplicity, ignore the energy he uses in coming down (which is small). assume that a typical efficiency for human muscles is 20.0%. therefore when your body converts 100 j from metabolizing fat, 20 j goes into doing mechanical work (here, climbing stairs). the remainder goes into extra internal energy. assume that the student's mass is 85.0 kg. (a) how many times must the student run the flight of stairs to lose 1.00 kg of fat? (b) what is his average power output, in watts and horsepower, as he runs up the stairs? (c) is this activity in itself a practical way to lose weight?
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Physics, 12.11.2019 04:31, bluebunny1231999
Energy is conventionally measured in calories as well as in joules. one calorie in nutrition is one kilocalorie, defined as 1 kcal = 4 186 j. metabolizing 1 g of fat can release 9.00 kcal. a student decides to try to lose weight by exercising. he plans to run up and down the stairs in a football stadium as fast as he can and as many times as necessary. to evaluate the program, suppose he runs up a flight of 95 steps, each 0.150 m high, in 63.0 s. for simplicity, ignore the energy he uses in coming down (which is small). assume that a typical efficiency for human muscles is 20.0%. therefore when your body converts 100 j from metabolizing fat, 20 j goes into doing mechanical work (here, climbing stairs). the remainder goes into extra internal energy. assume that the student's mass is 74.0 kg.(a) how many times must the student run the flight of stairs to lose 1.00 kg of fat? times(b) what is his average power output, in watts and horsepower, as he runs up the stairs? whp(c) is this activity in itself a practical way to lose weight?
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In a physics lab, a 60-kg student runs up a 2.0-meter tall flight of stairs in 1.5 seconds. the work...

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