Question

5. A 1kg ball is rotated in a vertical circle by
using a string of length 0.1 m. If the tension
in the string at the lowest point is 29.4N, its
angular velocity at that position is

1) 7 rads-1
2) 14 rads-1
3) 3.5 rads-1
4) 25.6 rads-1​

Answer 1

$\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}$

⭐Actually Welcome to the Concept of the Rotational Motion in Vertical Circle

since we know that,

⭐Velocity at the lowest point is given as

vL =

$v = \sqrt{5rg}$

⭐so , after solving we get as

⭐omega = 3.5 rad/sec

Answer 2

T at lowest point = mg + mv^2/r

29.4 =1×9.8 +1+v^2/ 0.1

29.4-9.8 =v^2 /o.1

(19.6) 0.1= v^2

√1.96=1.4

w =v/r

1.4/0.1 = 14