JEE Main Physics question

A bucket tied at the end of a 1.6 m long string is whirled in a vertical circle with a constant speed. The minimum speed at which water from the bucket does not spill when it is at the highest position is

• (A)4 m/sCorrect
• (B)6.25 m/s
• (C)2 m/s
• (D)16 m/s