A body of mass $0.4\, kg$ is whirled in a vertical circle making $2\, rev/sec$. If the radius of the circle is $2\, m$, then tension in the string when the body is at the top of the circle, is ......... $N$
A body of mass $0.4\, kg$ is whirled in a vertical circle making $2\, rev/sec$. If the radius of the circle is $2\, m$, then tension in the string when the body is at the top of the circle, is ......... $N$
$41.56 $
$89.86 $
$109.86$
$115.86$
A body of mass $0.4\, kg$ is whirled in a vertical circle making $2\, rev/sec$. If the radius of the circle is $2\, m$, then tension in the string when the body is at the top of the circle, is ......... $N$
Tension at the top of the circle,$T = m{\omega ^2}r - mg$
$T = 0.4 \times 4{\pi ^2}{n^2} \times 2 - 0.4 \times 9.8 = 115.86\,N$
Other Language