Problem 6-11 Dynamics with friction - Part 2 - B

A child is sliding down a water slide inclined at $25^\circ$ to the horizontal. The coefficient of kinetic friction between the child and the slide is $0.10$. What is the magnitude of the acceleration of the child? (Hint: $F_N$ is not equal to $mg$.)

In principle all choices are permissible but this is not the best choice.

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