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IRISSAK [1]
3 years ago
13

Last question bottom

Physics
1 answer:
Varvara68 [4.7K]3 years ago
3 0

Since the object is sliding at a constant speed, we know that the net force along the direction parallel to the incline must vanish.

Using the notation of the figure, the net force along the direction parallel to the incline is:

F_R = F_\parallel - F_f.

Given the geometry of the incline, we have:

F_\parallel = F_w \sin(19^\circ) = mg\sin(19^\circ).

Since F_R = 0, we get:

F_f = F_\parallel = mg\sin(19^\circ) \approx 12 \times 10 \times 0.33 \textrm{ N} = 39.6\textrm{ N}.

So the frictional force is:

\boxed{F_f = 39.6\textrm{ N}}.


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K_i is the initial kinetic energy, at the top

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K_f is the final kinetic energy, at the bottom

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Learn more about kinetic energy and potential energy:

brainly.com/question/6536722

brainly.com/question/1198647  

brainly.com/question/10770261  

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