Silly rocket question

by Bella
(ACT)

The question about the rocket:


6.) A rocket engine that takes off from earth burns 10,000 pounds of fuel in 15 minutes, and is able to lift 20,000 pounds total for that time period (including the rocket fuel itself). If a payload that weighs 20,000 pounds is needed to be transported for one hour, and unused rocket engines are dropped in stages after their fuel has been exhausted, how many rocket engines must be used to transport the payload for that time period?

Is so confusing and does not make any logical sense!!!

Fix this question!!!

Thank you

Comments for Silly rocket question

Average Rating starstarstarstar

Click here to add your own comments

Rating
starstarstarstarstar
Huh?
by: Anonymous

I figured it at 4 engines 1 engine is good for 15 minutes. 15 min. x 4 = 60 min/1 hour.

Rating
starstarstarstarstar
Rockets, shrockets
by: Anonymous

I think you're all off your rockets !!

Rating
star
Still doesn't make sense
by: Anonymous

How much does each rocket engine weigh? Are we to assume the rocket engines are weightless -- that is the only way to solve the problem and is not very realistic.

Rating
starstarstarstarstar
Now it makes sense
by: Bella

Thanks for clearing that up. I was too confused about all the rockets etc.


Rating
starstarstarstarstar
Logic
by: iStryker

Logic:
Stage 4:
20,000lb = 0,000 thrust (payload)
10,000lb = 20,000 thrust (rocket 1)
10,000lb = 20,000 thrust (rocket 2)
=
40,000lb = 40,000 of thrust

Stage 3:
40,000lb = 0,000 thrust (payload + 2 rockets)
10,000lb = 20,000 thrust (rocket 3)
10,000lb = 20,000 thrust (rocket 4)
10,000lb = 20,000 thrust (rocket 5)
10,000lb = 20,000 thrust (rocket 6)
=
80,000 = 80,000 of thrust

Stage 2:
80,000 = 0,000 of thrust (payload + 6 rockets)
8x(10,000lb) = 160,000 of thrust (8 more rockets)
=
160,000lb = 160,000 of thrust

Stage 1:
160,000 = 0,000 of thrust (payload + 14 rockets)
16x(10,000) = 320,000 of thrust (16 more rockets)
=
320,000lb = 320,000 of thrust
=
30 rockets

Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to views.

Recent Articles

  1. Im Apparently 125 and Higher

    Jan 11, 19 02:16 PM

    Im a 15 year old in high school and I took a test that said I had an IQ of 125 or higher meaning university level, But in high school im failing all most

    Read More

  2. Emotional Intelligence in Business Shines!

    Jan 07, 19 02:17 PM

    When your employer is looking for a workforce with emotional intelligence in business, you need to understand what is included in the emotional intelligence?

    Read More

  3. Evolution Continued

    Jan 07, 19 01:39 PM

    Descendants of early humans more or less continue with the same level of intelligence because nature did not drive change. Those who were subjected to

    Read More