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A mass of 12 kg is placed on a friction less incline with an additional force of 79 Newtons applied parallel to the incline, down the incline.  With the force applied, the magnitude of the normal force is a factor of 1.8 times less than the weight of the mass (w/1.8). With this force applied, it takes 2.6 seconds to travel from the top of the incline to the bottom of it when starting from rest at the top. What is the height, not length, of the incline in meters?

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