Anonymous
Anonymous asked in Science & MathematicsAstronomy & Space · 1 month ago

# If Sally could drive a flying car at a constant speed of 140.0 km/hr , how long would she take to drive to a solar object 7.1 AU away? ?

If Sally could drive a Jetson's flying car at a constant speed of 140.0 km/hr across oceans and space, approximately how long (in years) would she take to drive to a solar system object 7.1 AU away? Also, may you please provide the steps?

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• Do your own homework.  You learn better that way.

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• You know the speed and you know the distance, just do the math.

Convert 7.1 AU to kilometers first.

Time of travel = distance / speed.

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• An AU is about 150,000,000km.

150,000,000km / 140km/hr = 1,071,428.6 hours to complete a single AU, so

1,071,428.6 x 7.1 = 7,607,142.8 hours to go 7.1 AU.  (That's about 867 years...)

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• First thing we have to do is convert AU's  to Kilometers.

That would be 1.062e+9  Kilometers

Then just divide by 140.

That would be = = 7.5857142857143e6 Hours

there are 8760 hours is a year.

More Division.

That comes out  866 years

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• This is a simple question of rearranging the speed formula.

speed = distance / time

You are looking for time, so it now looks like this

time = distance / speed

The trick is to watch out for the units.

The speed is in km/h

Therefore, you need a distance in kilometres.

One astronomical distance is roughly 150,000,000 km

You need her to cover 7.1 times that distance.

You divide the distance to reach the object by the speed. Because of the units used, the result will be in hours.

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The official value of 1 AU = 149,597,870.7 km

(but we often use 150 million for quick calculations)

The length of the "average Gregorian year" is 365.2425 days of 24 hours each.

This is the duration used in our calendar over long periods of time.

However, for short periods (for example, if she gets there before the year 2100), we can use the "Julian year" of 365.25 days ( = 8766 h)

(She will take a lot longer...)

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At a speed of 140 km/h over a year of 8766 hours, she only covers 0.00818 AU per year. It would take her over 122 years to cover one AU.

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• Sally can't drive a car in space for the next 3 years because of multiple DWI's.

Source(s): [n] = 10ⁿ
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