An object of mass 8.6 kg moves along a flat surface and then up an incline with a steepness of 6.9∘∘.   If the object is moving with a speed of 4.4 m⋅⋅s-1 along the flat surface, how fast is it moving (in m⋅⋅s-1) after it has travelled 3.3 m along the incline? Assume that the incline is frictionless,  and ignore air resistance

College Physics
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ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
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An object of mass 8.6 kg moves along a flat surface and then up an incline with a steepness of 6.9∘∘.

 

If the object is moving with a speed of 4.4 m⋅⋅s-1 along the flat surface, how fast is it moving (in m⋅⋅s-1) after it has travelled 3.3 m along the incline? Assume that the incline is frictionless,  and ignore air resistance.

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how did you get the last answer i thought the final answer is 11.59

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