(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 62 kg crate is dragged across a floor by pulling on a rope attached to the crate and inclined 16° above the horizontal. (a) If the coefficient of static friction is 0.57, what minimum force magnitude is required from the rope to start the crate moving? (b) If μk = 0.31, what is the magnitude of the initial acceleration (m/s^2) of the crate?

2. Relevant equations

3. The attempt at a solution

Attempt of number (a)

fs=Fn*Ms

Let Fn + Tsin15=mg

Fn = mg - Tsin15

Attempt of number (b)

ma= Tcos15 - fk (Do I need to subtract fs in this equation?)

fs=magnitude of static friction. In this case, it's the maximum value of static friction.

Fn=normal force

T= tension of the rope

fk=magnitude of kinetic friction.

Are the equations of my attempts correct ?

How do find tension ? or is there anyway to cancel it out ?

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# Static friction and kinetic friction, solve for acceleration and force.

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