English, 13.06.2020 11:57 Emanuelle7474

A child is playing in a park on a rotating cylinder of radius, r , is set in rotation at an angular speed of w as shown below. The base of the cylinder is slowly moved away, leasing the child suspended against the wall in a vertical position. What is the minimum coefficient of friction between the child's clothing and wall is needed to prevent it from falling.

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Answer from: samavants74

Complete Question:

A child is playing in a park on a rotating cylinder of radius, r = 3.00 m , is set in rotation at an angular speed of w = 5.00 rad/s. The base of the cylinder is slowly moved away, leaving the child suspended against the wall in a vertical position. What is the minimum coefficient of friction between the child's clothing and wall needed to prevent it from falling

minimum coefficient of friction between the child's clothing and wall needed to prevent it from falling, $\mu = 0.131$

Explanation:

Applying the Newton's law:

$\mu N = mg$ ...............(1)

Where N = Normal reaction.

and $\mu$ = coefficient of friction

Since the cylinder is a rotating one, the normal reaction will be calculated using the formula $N = \frac{mv^{2} }{r}$ .................(2)

Substituting (2) into (1)

$\mu \frac{ mv^{2} }{r} = mg$ .............(3)

v = wr..........(4)

Substitute (4) into (3)

$\mu \frac{ m\omega^{2} *r^{2} }{r} = mg\\\mu \omega^{2} *r = g\\\mu = \frac{g}{\omega^{2} r }$

Substituting, w, g, and r into the equation above

Angular speed, w = 5 rad/s

Radius, r = 3 m

g = 9.8 m/s²

$\mu = \frac{9.8}{5^{2} *3 }$

$\mu = 9.8/75\\\mu = 0.131$

Answer from: Quest

write two paragraphs to compare and contrast the narrators’ schools and explain how their schools shape their perspectives toward the hijab. cite evidence from the text to support your ideas.

copy and paste answer:

two paragraphs to compare and contrast the narrator's schools would be this, the one school with the veil is the one school were the students were forced to wear the veils, and they did not know why they had to wear the veils. the girl student writing the story was not like the other students, she didn't care. in the second school there was a lot of hostile activities going on throughout the school. most of the students were upset and this, including the author, but she was trying to look and the good side of things.

overall, both schools had something that the students or most of the students did not like or appreciate. what you can learn from these stories is that life will never be exactly how you may want it to be. complaining about your lifestyle will only make matters worse or at least feel worse in the long run. that's happens to be the information you can interpret from these two stories.

Answer from: Quest

what lesson are you referencing?

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