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3 years ago

Please I need help on this thank you

Physics

2 answers:

Norma-Jean [14]3 years ago

4 0

The first option.

Refraction is basically the wave being messed up after passing through something. One is the only one that has it go fully through and get messed up

madam [21]3 years ago

4 0

The first one A
Have a great day :))

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Answer:

c. 0.816

Explanation:

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$f=\mu mg$

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Frictional force = Centripetal force

$f=F_c\\\\\mu mg=\frac{mv^2}{R}\\\\\mu=\frac{v^2}{Rg}$

Plug in the given values and solve for 'μ'. This gives,

$\mu = \frac{(40\ m/s)^2}{200\ m\times 9.8\ m/s^2}\\\\\mu=\frac{1600\ m^2/s^2}{1960\ m^2/s^2}\\\\\mu=0.816$

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Below is an attachment containing the solution.

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