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Answer 1

$\huge{\star}{\underline{\boxed{\red{\sf{Answer :}}}}}{\star}$

(1) 0.5

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Given :-

acceleration (a) = 20 m/s²

gravitational force (g) = 10 m/s²

mass of object = m

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To Find :-

Coefficient of friction (μ)

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Proof :-

#See the attachment for figure,

Now we know that,

$\huge{\boxed{\boxed{\sf{R \: = \: ma}}}}$

And

$\huge{\boxed{\boxed{\sf{f \: = \: mg}}}}$

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We, have formula,

$\Huge{\boxed{\boxed{\sf{\mu \: = \: \frac{F}{R}}}}}$

_________[Put values]

$\LARGE \leadsto {\sf{\mu \: = \: \frac{\cancel{m}g}{\cancel{m}a}}}$

$\Huge \implies {\boxed{\boxed{\sf{\mu \: = \: \frac{g}{a}}}}}$

_____________________________

Put values of a and g

$\Large \implies {\sf{\mu \: = \: \frac{\cancel{10}}{\cancel{20}}}}$

$\Huge \implies {\boxed{\boxed{\sf{\mu \: = \: 0.5}}}}$

∴ The value of friction of coefficient (μ) is 0.5

Answer 2

Answer:

Hope it helps...

Explanation:

See the attachment