Man Moving Crate: Physics Homework Help

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SUMMARY

The discussion revolves around a physics homework problem involving a man pulling a 100 kg crate with a force of 150 N. Key concepts include static friction (Чs = 0.2) and kinetic friction (Чk = 0.1). The participant attempts to calculate the maximum static friction force using the equation fsmax = Чs(N)(g), resulting in a value of 294 N. The participant seeks clarification on the specific requirements for each part of the question, particularly regarding the forces needed to start and maintain the crate's motion.

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My teacher gave us practice questions for the midterm. Can't for the life of me remember how to do this. Any hints would be greatly appreciated. I'm not just trying to bum answers off you guys; I really don't know where to start.

Homework Statement



Чs = .2 (the Ч is backwards - can't find a closer symbol, but you know what I mean)
Чk = .1
A man is pulling a 100 kg crate to the right. Fman = 150 N
a) What is the force? [er, not entirely sure what he means by this?]
b) Fman to get the crate moving?
c) Fman to move crate at constant speed?

Homework Equations



Unknown

The Attempt at a Solution



heh.
 
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You must show some work to get help here. What is the general equation relating the horizontal force on an object like that crate, the weight of the crate, and the coefficients of static and dynamic friction \mu_s , \mu_d ?
 
Well I know fsmax = Чs(N)(9.8)

So fmax = (.2)(150)(9.8)? which would be 294 N

Is that what he wants for part a?
 

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