Question

A stone of mass 3kg tied at the end of the string is rotated in a vertical circle at radius 5m at the constant speed 5m/s

Answer 1

Answer:

Tension at the highest point of the circle is:

r

mv

2

=mg+T

For minimum speed at the top tension in the string will be zero.

In that case v=

rg

, where g=9.8ms

−2

v=

49

So, v=7 ms

−1

.

Explanation:

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