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Volume 65 - Issue 433 - October 1981

Contents

Page 1 of 3

Oration

Other

Research Article

  • Motor Cycle Long Jump

  • M.N. Brearley
  • Published online by Cambridge University Press:
    22 September 2016, pp. 167-171

  • The practice of long jumping a motor cycle from an inclined ramp over obstacles such as parked buses has become popular with stunt-men. There have been serious accidents, some with fatal results. Some crashes have been caused by the faulty technique of keeping the throttle wide open after leaving the take-off ramp. In some cases this can lead to a backward rotation of the cycle by up to 90° during the jump, with inevitable disaster on landing.

  • What is an envelope?

  • J.W. Bruce, P.J. Giblin
  • Published online by Cambridge University Press:
    22 September 2016, pp. 186-192

  • If we draw a lot of circles centred on the x-axis and all having radius 1, as in the diagram, then the eye picks out the horizontal lines y = ± 1 running along the tops and bottoms of the circles.

Notes

Other

Correspondence

  • Beating exponential growth

  • R.H. Garstang
  • Published online by Cambridge University Press:
    22 September 2016, pp. 216-217
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  • A pi-less proof

  • E.H. Lockwood
  • Published online by Cambridge University Press:
    22 September 2016, p. 217
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Letter

  • Correspondence

  • Ian Anderson
  • Published online by Cambridge University Press:
    22 September 2016, p. 218
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Correspondence

  • Divergence rules O.K.?

  • J.E. Drummond
  • Published online by Cambridge University Press:
    22 September 2016, p. 218
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Page 1 of 3