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1. A box of cleaning supplies weighs 15n.if the box is lifted a distance of 0.60m,how much work is done?

A. 0.040 j
B.9 j
C.14 j (I PICK THIS)
D.25 j

2.to chop wood you apply 50.0n of force to an ax. The ax applies 600.0n of force to the wood. What is the mechanical advantage of the ax?

A. 650.0 (I PICK THIS)
B. 8.3
C. 12.0
D. 0.0833

3.you do 185 j of work pulling a cart up a ramp. if the ramp does 153 j of work, what is the efficiency of the ramp?

A. 82.7 percent
B. 121.0 percent(I PICK THIS)
C. 32.0 percent
D. 338.0 percent

4.remy noticed that after oiling his skateboard wheels, it was easier to reach the speeds he needed to perform his tricks. How did the oil help??

A. the oil reduced friction between the moving parts of the skateboard.

B. the oil increased friction between the moving parts of the skateboard(I PICK THIS

C. the oil reduced friction between the skateboard wheels and the ground.

D. The oil increased friction between the skateboard wheels and the ground

  • science -

    1. A box of cleaning supplies weighs 15n.if the box is lifted a distance of 0.60m,how much work is done?
    ===================
    Force * distance
    15 * .6 = 9 Joules
    ==========================


    A. 0.040 j
    B.9 j MY CHOICE
    C.14 j (I PICK THIS)
    D.25 j

    2.to chop wood you apply 50.0n of force to an ax. The ax applies 600.0n of force to the wood. What is the mechanical advantage of the ax?
    =====================
    600/50 = 60/5 = 12
    ===================

    A. 650.0 (I PICK THIS)
    B. 8.3
    C. 12.0 <---------------- MY CHOICE
    D. 0.0833

    3.you do 185 j of work pulling a cart up a ramp. if the ramp does 153 j of work, what is the efficiency of the ramp?
    -----------------------------
    I think you have a typo in the question
    If the useful work done is 153 and you needed 165 then
    100 * 153/185 = 82.7%
    ===================

    A. 82.7 percent <------ MY CHOICE
    B. 121.0 percent(I PICK THIS)
    C. 32.0 percent
    D. 338.0 percent

    4.remy noticed that after oiling his skateboard wheels, it was easier to reach the speeds he needed to perform his tricks. How did the oil help??
    *************************************
    A. the oil reduced friction between the moving parts of the skateboard.
    **************************************
    Oil REDUCES friction!
    ****************************

    B. the oil increased friction between the moving parts of the skateboard(I PICK THIS *********NO!!!!!

    C. the oil reduced friction between the skateboard wheels and the ground.

    D. The oil increased friction between the skateboard wheels and the ground

  • science -

    Your doomed

  • science -

    I don't know either

  • science -

    I may have an idea I think it would be A.

  • science -

    1.o.040j 2.650.0 3.338.0

  • science -

    1. B
    2. C
    3. A
    4. A

  • science -

    Thanks mo!

  • science -

    What about the last one? Matt forgot to put up question #5

  • science -

    The last one is d

  • science -

    1. B
    2. C
    3. A
    4. A
    5. D

    100% guaranteed
    I just took it

  • science -

    Thanks salted Caramel!

  • science -

    Thank You
    Salted Carmel!!! I got 100%

  • science -

    salted carmel and mo are right i got 100% : )

  • science -

    ITS JUST A CAMEL

  • Science -

    Thx Salted Carmel!

  • science -

    Salted Caramel is 100% correct. I have just taken the quiz and gotten a 5/5 100%

  • science -

    b
    c
    a
    a
    d

    5/5 100%

  • science -

    Thanks guys.

  • science -

    100% thx Caramel

  • science -

    This sit mad me get an f

  • science -

    thanks

  • science -

    yup,correct
    bcaad

  • science -

    thnx salted caramel i love you want to get married?

  • science -

    i got 4 out of 5 right

  • science -

    SALTED CARAMEL IS CORRECT! Thanks salted caramel! 100%

    Answers:
    1.B
    2.C
    3.A
    4.A
    5.D
    !!!!!

  • science -

    Salted Caramel is correct for Unit 3, Lesson 1

  • science -

    salted caramel rocks thanks dude!!!!!!!!!!!!:)

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