Navigate

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. Hard X-rays for the study of fractures in bones should have a minimum wavelength
  2. An object of mass 3kg is at rest. Now a force F=6t² i⃗+4t j⃗ is applied on the object
  3. The binding energy per nucleon of ₃⁷Li and ₂⁴He nuclei are 5.60 MeV and 7.06MeV
  4. The root mean square speed of oxygen molecule (O₂) at a certain temperature is v.
  5. A body initially at rest is moving with uniform acceleration a m/s²