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Homework Help: Multiple Choice quesionts

  1. Mar 8, 2007 #1

    MCS

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    Here are some muliple choice questions I am stuck on. Thanks in advance for help any one can give me.

    1) A falling object that has reached its terminal speed continues to gain?
    a.speed
    b.both speed and acceleration
    c.acceleration
    d.neither speed nor acceleration.
    I think the answer is D because once and object reaches terminal speed nothing changes...

    2)A car travels 30 meters in 5 seconds. What is its average speed?
    a.6 m/s
    b.25 m/s
    c.35 m/s
    d.150 m/s
    I think the answer in B

    3)It takes 6 seconds for a stone dropped from rest to hit the botom of a well. What is its final speed?
    a.6 meters/second
    b.30 meters/second
    c.36 meters/second
    d.60 meters/second.
    I think the answer is D.
     
    Last edited: Mar 8, 2007
  2. jcsd
  3. Mar 8, 2007 #2
    You got 1 and 3 right. Congratulations! :)
    Check 2. How do you define average speed?
     
    Last edited by a moderator: Mar 8, 2007
  4. Mar 8, 2007 #3

    arildno

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    Why 2b????
     
  5. Mar 8, 2007 #4

    MCS

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    I am not sure about average speed :-/ I will look in my book again
     
  6. Mar 8, 2007 #5

    MCS

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    so #2 is A?
     
  7. Mar 8, 2007 #6
    yes = 30/5
     
  8. Mar 8, 2007 #7

    MCS

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    thanks :-D
     
  9. Mar 8, 2007 #8
    No problem, wish they were all so straightforward.
     
  10. Mar 8, 2007 #9

    MCS

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    so do I...lol I am having a hard time with this course. The book is no help with these questions..it is like they took these questions from a totally different book.
     
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