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

Suppose the angles on an inclined plane are 60*(left-hand side) and 20* (right-hand side). If the left-hand mass is 2.1 kg, what should the right-hand mass be so that it accelerates downslope at 0.64 m/s/s?

2. Relevant equations

F=ma

3. The attempt at a solution

a=.64

Ml (left-side) = 2.1kg

Mr (right-side) = ?

θl = 60*

θr = 20*

Ml -> F = Mla -> T - Mlgsinθl = Mla

Mr -> F = Mra -> Mrgsinθr - T = Mra

I understand that since acceleration is the same then Mla + Mra = (Ml + Mr)a

I also know that T = Mla + Mlgsinθl

So I tried to sub in for T -> Mrgsinθr - Mla + Mlgsinθl = Mra but this doesn't make any sense to me. No matter how I look at it I can't seem to isolate Mr by itself. This is causing me considerable frustration.

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# Homework Help: Two forces held by pulley's on an inclined plane.

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