Find the minimum internal work done by the hikers muscles

Assignment Help Physics
Reference no: EM13274433

A hiker weighing 565 N carries a 186 N pack up Mt. Whitney (elevation, 4420 m), increasing her elevation by 3000 m.

(a) Find the minimum internal work done by the hiker's muscles.

(b) If she is capable of producing up to 746 W (1.0 hp) for an extended time, what is the minimum time for her to ascend?

Reference no: EM13274433

Questions Cloud

How much energy must be added to the water by heating : You wish to boil 1.1 kg of water, which has a specific heat capacity of 4186 J/kg-K. The water is initially at room temperature (293 K). Water boils at 373 K. How much energy must be added to the water by heating it in order for it to start boiling
By what factor is total number of states for molecul increas : A box with a volume of 3.9 L contains 4 molecules. By what factor is the total number of states for all molecules increased
How would you qualify what is outside of the norm : What, in your opinion after reading the chapter, constitutes "abnormal" behavior. How would you qualify what is outside of the "norm"
What is the cars acceleration : a car driving on the turnpike accelerates uniformly from 84.0 ft/s (57.3 mph) to 112 ft/s (76.4 mph) in 3.60s. what is the cars acceleration
Find the minimum internal work done by the hikers muscles : A hiker weighing 565 N carries a 186 N pack up Mt. Whitney (elevation, 4420 m), increasing her elevation by 3000 m. Find the minimum internal work done by the hiker's muscles
What is its final speed at the end of the slope : A cart that is initially at rest moves down a slope that is inclined at 5o above the horizon, What is its final speed at the end of the slope
How far away is the reflecting object : A sound wave, traveling at 353m/s, is emitted by the foghorn of a tugboat. How far away is the reflecting object
What was the average speed of the base- ball : A student throws a baseball at a large gong 76 m away and hears the sound of the gong 1.95758 s later. What was the average speed of the base- ball on its way to the gong
Compute the intermolecular collision frequency : Calculate the intermolecular collision frequency and the mean free path in a sample of helium gas with a volume of 5.0 L at 27C and 3 atm. Assume the diameter of a He atom is 50 picometers (pm).

Reviews

Write a Review

Physics Questions & Answers

  What is the speed of the block immediately after the bullet

A 28  kg child plays on a swing having support ropes that are 1.80 m long. A friend pulls her back until the ropes are 43 from the vertical and releases her from rest.

  The monkey stops its climb and holds onto the rope

A number of people are riding in a hot-air balloon. The combined mass of the people and balloon is 281 kg. The balloon is motionless in the air, since the downward-acting weight of the people and balloon is balanced by an upward-acting 'buoyant' f..

  Find the height of the cliff

A ball is placed on an edge of a cliff and it is kicked by a soccer player at 20.0 m/s at an angle of ? = 30? above the horizontal, Find the height of the cliff

  Illustrate what are all the forces acting on the rod

The rod is initially at rest and oriented horizontally and then released so that it swings to the bottom. Illustrate what are all the forces acting on the rod?

  Determine the magnification of the image on the film

A lens for a 35-mm camera has a focal length given by f = 40mm. What is the magnification of the image on the film

  Find out the magnitude of the acceleration of particle

A discussion of why the ideal gas law is expected to fail at low temperatures and how its failure may affect your estimation of absolute zero.

  Find the height of the target above sea level

A submarine is 2.95 multiply.gif 102 m horizontally from shore and 1.00 multiply.gif 102 m beneath the surface of the water. Find the height of the target above sea level

  Determine the frequency of the second overtone

Suppose you have a tube 1.20 m long, open on both ends. Determine the frequency of the 2nd overtone, assuming the speed of sound to be 343 m/s. Repeat for the same length tube but with a closed end.

  What is the speed of the helium atoms in the tank

A 18 liter tank of helium is at a pressure of 192 kPa at a temperature of 0 C. A.) How many moles of helium are there in the tank? B.) If the volume of the tank expands to twice its initial volume at constant pressure, what is the new temperature?..

  What happens to an angular velocity

A gymnast with mass m1 = 47 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 118 kg and length L = 5 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left end ..

  What is the objects speed at the bottom of the slope

A 65.0 kg object slides down a 30o angle slope from rest at a height of 15.0 m. The coefficient of kinetic friction between the object and the slope surface is 0.15. What is the object's speed at the bottom of the slope

  What power be delivered to the solenoid

A dentist uses a small mirror of radius 44mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 13 mm from the tooth, what is magnification of the image.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd