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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.
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- The half-life of a radioactive substance is 30 min. The time (in minutes) taken
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- The angle of incidence for a ray of light at a refracting surface of a prism is 45⁰.
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Topics: Laws of Motion
(103)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The length of an elastic string is a metre when the longitudinal tension is 4N and b
- The half-life of a radioactive substance is 30 min. The time (in minutes) taken
- On adjusting the P-N junction diode in forward bias,
- The angle of incidence for a ray of light at a refracting surface of a prism is 45⁰.
- If the terminal speed of a sphere of gold (density=19.5 kg/m³) is 0.2 m/s
Topics: Laws of Motion (103)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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