posted by .

How much energy in kilocalories is expended against gravity alone by a 75- kg man climbing 1500 m up a mountain?

  • Physics -

    (75 kg) (1500m) (9.8 m/sec2) / 4184 J = 263 kcals

  • Physics -

    Calculate the gravitational potential energy of the water in a lake of volume 100km^3 (mass=1.0x10^14kg). The lake has an average height of 50m above the hydroelectric generators at the base of the dam holding the water back.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    I'm having a problem understanding a question. "If a man exerts a 200N force while pushing a crate 5.0 m across a floor against a frictional resistance of 40N, how much energy was expended by the person pushing?
  2. physics

    A man drags a sack of flour of mass 50 kg at constant speed up an inclined plan to a height of 5m. The plane makes an angle of 30„awith the horizontal and a constant frictional force of 200 N acts on the sack down the plane. 1- How …
  3. Chemistry 152

    How many of the following processes would you expect to be spontaneous at 298K and 1atm?
  4. calculus

    A 160-lb man carries a 25-lb can of paint up a helical staircase that encircles a silo witha radius of 20 ft. If the silo is 90 ft high and the man makes exactly three complete revolutions, how much work is done by the man against …
  5. physics

    (a) calculate the number of kilocalories needed to climb 232 stair steps (116 steps per minute for 2 min.) *climbing stairs (116/min.) = energy consumption rate is 9.8 (kcal/min) * (b) calculate the gain in gravitational potential …
  6. Physics

    A man pushes a lawn mower on a level lawn with a force of 200N it 40% of this force is directed downward how much woek is done by the man in pushing the mower 6.0m Q. It the man in the above question expended 60 W of power in pushing …
  7. physics

    calculate the number of kilocalories needed to climb 232 stair steps (116 steps per minute for 2 min.) climbing stairs (116/min.) = energy consumption rate is 9.8 (kcal/min)
  8. physics

    The student’s body is 22% percent efficient; that is, for every 22 J that are converted to mechanical energy, 100 J of chemical energy are expended, with 78 J going into thermal energy. How much chemical energy is expended by …
  9. Physics

    a . rather then taking the elevator a a 65kg student decided to climb 276m vertical height of stairs to the observation deck of the effiel tower. How much work does the student do against gravity climbing to this level?
  10. Physics

    If your mass is 71 kg, what is the minimum number of calories you would "burn off" climbing a 2100 m-high mountain?

More Similar Questions