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3 years ago

A 1200-kg car moving at 20 km/h is accelerated

Engineering

1 answer:

Grace [21]3 years ago

4 0

Answer:

Force on the car will be 4800 N and time required to cover this distance 13.75 sec

Explanation:

We have given mass of the car = 1200 kg

Initial velocity u = 20 km/h

Final velocity v = 75 km/h

Acceleration $a=4m/sec^2$

From the first equation of motion we know that

v = u+at, here v is final velocity, u is initial velocity, a is acceleration and t is time

So $75=20+4\times t$

t = 13.75 sec

From second law of motion we know that $F=ma$

So force $F=1200\times 4=4800N$

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Answer:

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Detention time 2.34 hr

weir loading 114.06 m^3/d/m

Explanation:

calculation for single clarifier

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$surface area = 314.16 m^2$

volume of tank $V = A\times side\ water\ depth$

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Detention time $t_d = \frac{volume}{flow} = \frac{628.32}{6450} \times 24 = 2.34 hr$

weir loading $= \frac{flow}{weir\ length} = \frac{6450}{56.549} = 114.06 m^3/d/m$

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2 years ago

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