Mathematics

Problem

## Questions 56-57 The accompanying graph describes the motion of a marble on a table top for 10 seconds. ![](https://storage.googleapis.com/diraq-contents/question-bank/question-images/f30dd04b2fa3/2025_11_20_329fe3e643ae1b5596f9g-11.jpg) 57. For which time interval(s) did the marble have a positive acceleration? (A) from

t=0.0 \mathrm{~s}

t=8.0 \mathrm{~s}

only (B) from

t=0.0 \mathrm{~s}

t=3.6

only (C) from

t=3.8 \mathrm{~s}

t=4.8 \mathrm{~s}

and

t=6.2 \mathrm{~s}

t=6.8 \mathrm{~s}

only (D) from

t=2.0 \mathrm{~s}

t=2.5 \mathrm{~s}

, from

t=5.8 \mathrm{~s}

t=6.2 \mathrm{~s}

, and from

t=8.4 \mathrm{~s}

t=8.8 \mathrm{~s}

only

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