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Newton's second law

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The boy of mass 40kg is sliding down the spiral slide at a constant speed such that his position, measured from the top of the chute, has components r=1.5m, theta=(0.7t)rad, and z=(-0.5t)m, where t is in seconds. Determine components of force: F(subscript r), F(subscript theta), and F(subscript z) which the slide exerts on him at the instant t=2s. Neglect the size of the boy.

https://brainmass.com/physics/velocity/newtons-second-law-28370

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The solution shows how to calculate the acceleration in cylindrical coordinates.
The solution contains 3 pages with full derivations and illustrations.

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