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##### Problem of the Day !!! / Re: 5/10/2018 Dynamics

« Last post by**levi2144**on

*May 13, 2018, 03:47:12 PM*»

4561.9

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4561.9

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ans D

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Question:

A group of dogs pull a sled across a snow covered surface. It takes 7 hours to pull the 250 kg sled 125 kilometers. If the static friction is 0.6 and the dynamic friction is 0.15 what is the average power exerted by the dog sled team?

A group of dogs pull a sled across a snow covered surface. It takes 7 hours to pull the 250 kg sled 125 kilometers. If the static friction is 0.6 and the dynamic friction is 0.15 what is the average power exerted by the dog sled team?

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how did you organize your study time? Did you tackle one subject at a time, and if so did you have a problem remembering the material from the first subject you studied by the time you got to the last one?

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All you need is:

P = pgh

p= 1000 kg/m^3

g = 9.81 m/s^2

h = 18 meters

14.7 psi is extra information.

= 177,120 pa

P = pgh

p= 1000 kg/m^3

g = 9.81 m/s^2

h = 18 meters

14.7 psi is extra information.

= 177,120 pa

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I'm on it! Thank you for this great resource, it's really making me stay focused on this stupid exam..

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Question:

What is the gauge pressure of at a point that is 18 meters below the surface of water that has an atmospheric pressure of 14.7 PSIA?

What is the gauge pressure of at a point that is 18 meters below the surface of water that has an atmospheric pressure of 14.7 PSIA?

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Is the exam easy?

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see page 110 of the FE Handbook for the equation.

= (20 cm)(980 cm/s^2)(12.6 g/cm^3)

= 247,000 g/cm-s^2

= (20 cm)(980 cm/s^2)(12.6 g/cm^3)

= 247,000 g/cm-s^2

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don't really need an equation, just set up the bernoulli equation across the device. I think I have it solved. I'll post it when I double check my solution.