JEE Main Physics question
A stone tied to a string of length is whirled in a vertical circle with the other end of the string at the centre. At a certain instant of time, the stone is at its lowest position and has speed . The magnitude of the change in its velocity as it reaches a position where the string is horizontal is [IIT JEE 2004, CBSE PMT 2004]
Answer: (D)
Solution
At the bottom, (horizontal). On rising by height to the side (string horizontal), speed
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