Circular MotionHard
Question
A bucket is whirled in a vertical circle with a string attached to it.The water in bucket does not fall down even when the bucket is inverted at the top of its path. We can say that in this position.
Options
A.mg = 
B.mg is greater than
C.mg is not greater than
D.mg is not less than
Solution
For water does not fall at topmost point of path that means at topmost point N should be greater than or equal to zero.
for N = 0 mg =
and for N > 0, mg <
so that mg is not greater than
mg,
for N = 0 mg =
and for N > 0, mg <
so that mg is not greater than
mg,
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