How Would I Go About Solving These?

Question

If I wanted to travel to Neptune from Earth (2.68billion miles), how long would it take me?

And if I had to travel at a speed of 25000mph (gets out of the gravitational pull) for the whole trip, how long would it take me?


Thanks!

Answer 1

It's a simple application of the equation distance = speed*time: D = Vt

In your case, you know distance and speed. Rearrange the equation to solve for time: t = D/V

Now plug and chug:
t = 2.68 billion miles/ (25000mph)
You'll probablly want to convert hours to years. Do dimensional analysis:
hr * (1 day/24 hrs) * (1 yr/365.24 days)

Answer 2

There is insufficient data. Neptune is 30 a.u. from the sun, so a Hohmann transfer orbit to get there from earth would take approximately 0.5 x ((1 + 30)/2)^1.5 years, or 30.5 years. Spacecraft going there have been accelerated by the gravity of Jupiter and Saturn, so have required less time. It is meaningless to divide the distance by a velocity to get a time (as previous responders have done), as the physics doesn't work that way.

Answer 3

Use the equation Distance = Velocity * Time

Rearrange the equation so you're solving for time:

Time = Distance / Velocity

Then plug in the numbers. Remember your answer will be in hours (since the velocity is in miles per hour). So you might have to convert hours to days or years or whatever.

Answer 4

This questions is solved by setting up a ratio between the two. 2,680,000,000 miles / X hours = 25,000 miles / 1 hour. X = 2,680,000,000/25,000 = 107,200 hours = 4,466 days 16 hours.

Answer 5

Distance = rate * time

2.68(10^9) = 2.5(10^4) * time

time = 1.072(10^5) hrs or 122.4 years

You better plan on your grandchildren finishing the trip for you.
.

Answer 6

To find the answer you would divide your distance by your speed which would leave you with time, so 2.68 billion/25,000 = 107,200 hours.