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Author Question: What is the primary function of any lubricant? What will be an ideal ... (Read 48 times)

natalie2426

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on: Aug 19, 2018
What is the primary function of any lubricant?
 
  What will be an ideal response?

Question 2

A 500 pound push cart is rolled up an inclined plane that is 20 feet long. The vertical distance the object is raised is 4 feet. Assuming no friction, how much effort will it take to push the cart up the incline?
 
  What will be an ideal response?

Question 3

Give an example of a First, Second, and Third class lever.
 
  What will be an ideal response?


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gabrielle_lawrence

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Reply #1 on: Aug 19, 2018
Answer to Question 1

The primary function of any lubricant is to prevent metal to metal contact of moving surfaces, whether they are sliding or rolling.

Answer to Question 2

Output work = Output force x Output distance
Output work = 500 lb x 4 ft
Output work = 2000 ft-lbs.

With no friction, Input work equals Output work, therefore:

Input force = Input work / Input distance
Input force = 2000 ft-lbs / 20 feet
Input force = 100 lbs force.

Answer to Question 3

Seesaw, wheelbarrow, and man's arm.


natalie2426

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Reply 2 on: Aug 19, 2018
Thanks for the timely response, appreciate it

sarah_brady415

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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