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Question Answer Tutorial - Physics->Circular Motion

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Question: A body of mass m is suspended from a string of length l. What is the minimum horizontal velocity
that should be given to the body in its lowest position so that it may complete full revolution in
the vertical plane with the point of suspension at the center of circle?
Answer: √5gl
                        
Question: A body of mass m performing UCM with frequency n along the circumference of circle having radius r,
force is given by
Answer:2n2m
                        
Question: A bucket containing water is tied to one end of a rope of length 2.5 m and rotated about the other
end in a vertical circle. What should be the minimum velocity of the bucket at the highest point, so
that the water in the bucket will not spill? (g = 10 m/s2)
Answer: 5 m/s
Question: A bucket tied at the end of a 1.6 m long string is whirled in a vertical circle with a constant
speed. What should be the minimum speed so that the water from the bucket does not spill when the
bucket is at the highest position?


Answer: 4 m/sec
Question: A can filled with water is revolved in a vertical circle of radius 4 metre and the water does not
fall down. The time period of revolution will be
Answer: 4 Sec
                        
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