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3 years ago

If a car travels 600m west in 25 seconds, what is its velocity?

Physics

1 answer:

Elena L [17]3 years ago

4 0

$v = \frac{ \:the covered distance}{time} \\$

$v = \frac{600}{25} = \frac{6 \times 100}{25} = 6 \times 4 = 24 \: \\$

$v = 24 \: \frac{m}{s} \\$

_________________________________

If west means the west of the axis x the velocity equal :

$- 24 \: \frac{m}{s} \\$

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Answer:

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We know that speed expression is as $\mathrm{V}^{2}=\mathrm{V}_{\mathrm{i}}^{2}+2 . \mathrm{a} . \Delta \mathrm{s}$ .

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$\mathrm{F}=\mathrm{m} \times \mathrm{a}$

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Compare the above equation

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Cancel "m" common term in both L.H.S and R.H.S

$\text { Equation becomes, } \mu \times g=a$

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$\mu=\frac{2.25}{9.8}$

$\mu=0.229$

Hence coefficient of friction is 0.229.

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$\text { We know that } \mathrm{F}=\mathrm{m} \times \mathrm{a}$

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