A stone is tied to a string of length l and whirled in a vertical circle with the other end

A stone is tied to a string of length l and whirled in a vertical circle with the other end of the string as the centre.At a certain instant of time,the stone is at its lowest position and has speed u.The magnitude of the change in velocity as it reaches a position where the string is horizontal (g being acceleration due to gravity) is

Options

(a) √2(u² – gl)
(b) √(u² – gl)
(c) u – √(u² – 2gl)
(d) √2gl

Correct Answer:

√2(u² – gl)

Explanation:

No explanation available. Be the first to write the explanation for this question by commenting below.

admin:

Related Questions

  1. Source S₁ is producing, 10¹⁵ photons per second of wavelength 5000Å
  2. Radioactivity of a sample at T₁ time is R₁ and at time T₂ is R₂. If half-life
  3. A particle is kept at rest at the top of a sphere of diameter 42m.When disturbed slightly
  4. Lumen is the unit of
  5. Which one of the following is not a unit of young’s modulus?