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2 years ago

11

If you ran 15 km/hr for 2.5 hours, how much distance would you cover?

1 answer:

SVETLANKA909090 [29]2 years ago

6 0

Answer: 37.5 km

Explanation:

The question is that

If you ran 15 km/hr for 2.5 hours, how much distance would you cover ?

Where

Speed = 15 km/ hr

Time = 2.5 hours

Using the formula for speed.

Speed = distance/time

Substitute speed and time into the formula

15 = distance/ 2.5

Make distance the subject of formula by cross multiplying.

Distance = 15 × 2.5

Distance = 37.5 km.

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The Payload Fraction is:

$m_{pay} = \frac{m_{pay}}{m_{t}}$

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The value of Δv is calculated by the formula:

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$V_{e} = g_{0}.Isp$

$V_{e} =$ 9.81*450

$V_{e} =$ 4414.5

$m_{final}$ is the total mass after the rocket consume all the propellant and $m_{initial}$ is the total mass before the action.

Δv = $-V_{e}. ln(\frac{m_{final}}{m_{initial}} )$

Δv = $-4414.5.ln(\frac{15,000}{115,000} )$

Δv = - 4414.5.ln(0.13)

Δv = 8991.81

Δv will be 8991.81 m/s.

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