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2004 · Q125Science & TechnologyPhysicseasy

A spherical body moves with a uniform angular velocity ω around a circular path of radius r. Which one of the following statements is correct?

  1. (a)The body has no acceleration
  2. (b)The body has a radial acceleration ω²r directed towards the centre of the path
  3. (c)The body has a radial acceleration 2/5 ω²r directed away from the centre of the path
  4. (d)The body has an acceleration ω²r tangential to its path
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Official answer(b) The body has a radial acceleration ω²r directed towards the centre of the path

2015 · Q30Science & TechnologyPhysicsmoderate

In the context of modern scientific research, consider the following statements about ‘IceCube’, a particle detector located at South Pole, which was recently in the news : 1. It is the world’s largest neutrino detector, encompassing a cubic kilometre of ice. 2. It is a powerful telescope to search for dark matter. 3. It is buried deep in the ice. Which of the statements given above is/are correct?

  1. (a)1 only
  2. (b)2 and 3 only
  3. (c)1 and 3 only
  4. (d)1, 2 and 3
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Official answer(d) 1, 2 and 3