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

Find the acceleration of block A when moving downward

Theta=40 degrees

A=103N

B=31N

Static coefficient = 0.56

Kinetic coefficient = 0.25

2. Relevant equations

F=ma

Normal Force * Kinetic coefficient = Friction Force

3. The attempt at a solution

From 103/9.8 I get a mass of ~10.5

Breaking 103 into components, 103sin40 and 103cos40, the first being perpendicular and the second being along the plane

103sin40*0.25=Friction Force

Tension is 31, so the sum of forces is:

(31+103sin40*0.25)-103cos40 = Fnet

Fnet/10.5 = Acceleration of A

is this correct?

Thanks!

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# Homework Help: Acceleration of block down an incline

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