There's an inclined plane with theta unknown. The frictional coefficient is 0. m1 is higher on the inclined plane than m2.(adsbygoogle = window.adsbygoogle || []).push({});

m1 = 1680kg

m2 = 152kg

Distance between the two: 11mm

At what angle of inclination will the 2nd mass begin to slide down the plane?

Normally (without 2 objects) I know that net force would have to equal 0 in order for the box to slide down. In other words, it would be Fgx - Ff = Fnet = 0.

I first started with this:

1489.6sinθ - 0 = 0 But I know the law of universal gravitation plays a part in this. I was thinking about making the 1489.6sinθ equal to the universal gravitational equation since I have all the variables.

1489.6sinθ = (Gm1m2)/(r^2)

Would this be the correct thing to do? If so, I'm confused as to why they would be equal. Thanks.

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# Homework Help: Universal gravitation and inclines

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