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Mathematics: Post your doubts here!

Could you please help me out on this question : Why a runner's acceleration cannot exceed 10μms^-2?. where μ is the coefficient of friction between her shoes and the track. The highest speed that a runner can keep during 800 m race is 8 ms^-1. Show that the fastest time she can hope to achieve...
- Pixie Twinkles
- Post #16,964
- Feb 28, 2016
- Forum: A-Levels
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Mathematics: Post your doubts here!

Thank you so much!! :)
- Pixie Twinkles
- Post #16,927
- Feb 22, 2016
- Forum: A-Levels
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Mathematics: Post your doubts here!

A book of mass 0.8 kg is placed on a rough plane inclined at an angle of 60 degrees to the horizontal. The book is just prevented from sliding down the plane by a force of magnitude 5N acting parallel to the line of greatest slope to the plane. Find the coefficient of friction between the book...
- Pixie Twinkles
- Post #16,921
- Feb 22, 2016
- Forum: A-Levels
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Physics: Post your doubts here!

http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w05_qp_1.pdf Question 7 .. how is the correct answer D?
- Pixie Twinkles
- Post #14,626
- Feb 18, 2016
- Forum: A-Levels

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