- #1

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Possible answers:

A. T seconds.

B. √2 T seconds.

C. 2T seconds.

D. 2 √2 T seconds.

E. 4T seconds.

Can anyone give me a hint without giving the answer?

- Thread starter Kaldanis
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- #1

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Possible answers:

A. T seconds.

B. √2 T seconds.

C. 2T seconds.

D. 2 √2 T seconds.

E. 4T seconds.

Can anyone give me a hint without giving the answer?

- #2

Delphi51

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The approach to any problem is to first realize what is going on and write equations that apply to it. In this case, accelerated motion is going on. Can you write equations that apply?

- #3

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Is it by rearranging s= ut + .5at^{2}?

- #4

SammyS

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Yes, and of course, the initial velocity u is zero.Is it by rearranging s= ut + .5at^{2}?

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- #6

Dick

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Sure that's right. If the displacement changes by a factor 4, T changes by a factor of 2. You might be thinking of a different problem.

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I must be, that's the only thing that was throwing me off since I first saw the question. I thought I remembered a root2 in there so I was doubting the obvious answer of 2T! Anyway, thank you. :)Sure that's right. If the displacement changes by a factor 4, T changes by a factor of 2. You might be thinking of a different problem.

- #8

SammyS

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Yes, 2T is correct.

When the problem was done earlier, in class, was it exactly the same, or just similar. After all, 2=√4 .

- #9

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That's true, but for some reason √2 was stuck in my head. At least I know now for incase it comes up in the exam in January, because I would have doubted myself and picked one of the √2 answers.Yes, 2T is correct.

When the problem was done earlier, in class, was it exactly the same, or just similar. After all, 2=√4 .

- #10

PeterO

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When you do the exam in January, are you allowed to take in a self-prepared "formula sheet" or page of notes?That's true, but for some reason √2 was stuck in my head. At least I know now for incase it comes up in the exam in January, because I would have doubted myself and picked one of the √2 answers.

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We are given a formula sheet but I'm not sure if we'e allowed to add anything to it. I planned on finding that out when we go back. Luckily it gives the equations I have the hardest time remembering or being able to prove to myself. I wish we were allowed to take in a page of notes for Algebra... not looking forward to that!When you do the exam in January, are you allowed to take in a self-prepared "formula sheet" or page of notes?

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